| abduction | moving a limb or body part away from the midline | 
| acetabulum | hip socket | 
| achondroplasia | failure in the development of cartilage (a type of dwarfism) | 
| adactyly | absence of the fingers | 
| adduction | moving a limb or body part toward the midline | 
| agonist | the "prime mover": the muscle primarily responsible for the movement being studied | 
| amphiarthrotic | slightly moveable joint | 
| analgesic | drug that reduces pain | 
| ankylosing | causing to be stiff | 
| ankylosis | a disease that makes bones or joints stiff | 
| antagonist | a muscle that opposes the action of the agonist | 
| antiarthritic | drug that reduces the symptoms of arthritis | 
| anti-inflammatory | drug that reduces inflammation | 
| antipyretic | drug that reduces fever | 
| apophysis | outgrowth or protuberance on a bone | 
| appendicular | part of the skeleton that is attached to the axial skeleton (i.e. the upper and lower extremities) | 
| arthralgia | pain in the joints | 
| arthrectomy | surgical removal of a joint | 
| arthrocentesis | puncture of a joint to remove fluid | 
| arthroscope | device for examining the inside of a joint | 
| arthrodesis | disease process binding a joint together | 
| arthrodynia | pain in the joints | 
| arthrodysplasia | bad formation of a joint | 
| arthrogram | picture of a joint | 
| arthrography | process for visualizing a joint | 
| arthropathy | disease in a joint | 
| arthroplasty | surgical modification of a joint | 
| arthroscopic | pertaining to examination of a joint using an arthroscope | 
| arthrotomy | cutting into a joint | 
| articular | having to do with joints | 
| ataxia | inability to walk | 
| atrophy | failure to develop, or loss of a structure, due to lack of nourishment | 
| axial | pertaining to the center of the body (cf. appendicular) | 
| bradykinesia | slow movement | 
| bursa | "purse"; a bag of synovial fluid that cushions a ligament or tendon that would otherwise rub against a bone | 
| bursectomy | surgical removal of a bursa | 
| bursitis | inflammation of a bursa | 
| bursotomy | cutting into a bursa | 
| carpal | pertaining to the wrist bones | 
| carpectomy | surgical removal of a wrist bone | 
| carpitis | inflammation of a wrist bone | 
| cervical | pertaining to the neck | 
| cervicitis | inflammation of the neck | 
| cervicodynia | pain in the neck | 
| chondritis | inflammation of the cartilage | 
| chondrodynia | pain in the cartilage | 
| chondroma | tumor in the cartilage | 
| chondromalacia | softening of the cartilage | 
| chondroplasty | surgical modification of cartilage | 
| circumduction | movement in a circle around a joint | 
| condyle | knob on a bone | 
| costal | pertaining to a rib | 
| costalgia | pain in a rib | 
| costectomy | surgical removal of a rib | 
| costochondritis | inflammation of the rib and associated cartilage | 
| craniectomy | surgical removal of a piece of the skull | 
| craniomalacia | softening of the skull | 
| craniometer | device for measuring the skull | 
| craniosynostosis | disease where the skull bones of a child fuse too soon after birth | 
| craniotomy | cutting into the skull | 
| crepitation | crackling noise in the joints | 
| dactylalgia | pain in the fingers | 
| dactylitis | inflammation of the fingers | 
| diaphysis | the shaft of a long bone | 
| diarthrotic | freely moveable joint | 
| dyskinesia | trouble with movement | 
| dysplasia | malformation of a structure | 
| dystaxia | trouble with walking | 
| dystonia | trouble with muscle tone (strength) | 
| eccentric | force applied to a muscle as it is getting longer | 
| effusion | the process of fluid leaking out of a structure | 
| electromyogram | record of the electrical activity of a muscle | 
| electromyography | obtaining a record of the electrical activity of a muscle | 
| endochondral | occurring inside of cartilage (refers to a type of bone development) | 
| endomysium | the innermost connective tissue sheath of a muscle | 
| epimysium | the outermost connective tissue sheath of a muscle | 
| epiphysis | the ends of a long bone (distal epiphysis or proximal epiphysis) | 
| epicondyle | a bump next to a knob on a bone | 
| exostosis | abnormal bone growth in the small ear bones (ossicles) | 
| extension | increasing the angle of a joint | 
| facet | a flattish surface on a bone where a joint articulates (it is supposedly similar to the flat surface of a cut jewel) | 
| fascia | band of connective tissue | 
| fasciectomy | removal of a fascia | 
| fasciitis | inflammation of a fascia | 
| fascioplasty | surgical modification of fascia | 
| fasciorrhaphy | surgical repair of a fascia | 
| fasciotomy | cutting into a fascia | 
| femoral | pertaining to the thigh | 
| fissure | a deep crack | 
| fixation | locking into place | 
| flexion | reducing the angle of a joint | 
| foramen | hole in a bone | 
| fossa | shallow groove in a bone | 
| fracture | breaking a bone | 
| genu | knee | 
| glenoid | the socket of the shoulder joint | 
| gomphosis | the joint between a tooth and the jaw | 
| graphospasm | writer's cramp | 
| hallux | the big toe | 
| hemarthrosis | blood in a joint | 
| hematopoiesis | the process of blood cell formation in the bone marrow | 
| hydrarthrosis | water (excess fluid) in a joint | 
| hypercalcemia | abnormally high calcium in the blood | 
| hyperextension | abnormal or excessive increase in the angle of a joint | 
| hyperkinesia | abnormally high movement | 
| hypertonia | abnormally high muscle tone (strength) | 
| hypertrophy | abnormal growth of tissue | 
| hypocalcemia | abnormally low calcium in the blood | 
| hypokinesia | abnormally low movement | 
| hypophyseal | pertaining to the tissue underneath the brain (i.e. the pituitary gland) | 
| hypophysis | the pituitary gland | 
| hypotonia | abnormally low muscle tone (strength) | 
| infraspinatus | a muscle or space below the spine of the scapula | 
| intercostal | between the ribs | 
| interosseous | band of connective tissue between the radius and ulna or between the tibia and fibula | 
| intramembranous | occurring within a membrane (refers to a type of bone development) | 
| isometric | force applied to a muscle without a change in muscle length | 
| kinesiology | the study of movement | 
| kinetic | pertaining to motion | 
| kyphosis | "hunchback": a bend in the spine that results in a visible bump in the upper back | 
| lacrimal | pertaining to crying or tears | 
| lamella | thin plate | 
| ligament | a band of connective tissue connecting bone to bone | 
| lordosis | "swayback": a bend in the spine that results in a pronounced hollow space above the buttocks | 
| lumbar | lower back | 
| lumbodynia | pain in the lower back | 
| meatus | tube or passage | 
| medullary | pertaining to the center of a multilayered organ (in this case, the bone marrow) | 
| metacarpal | the bones between the wrist and fingers | 
| metacarpectomy | surgical removal of a metacarpal | 
| metaphysis | transition between the end and the shaft of a long bone | 
| metatarsalgia | pain in the bones between the ankle and toes | 
| metatarsals | the bones between the ankle and toes | 
| musculoskeletal | pertaining to the muscles and bones | 
| myalgia | pain in the muscles | 
| myasthenia | disease of muscle weakness | 
| myectomy | surgical removal of a muscle | 
| myoclonus | involuntary muscle twitch | 
| myodynia | pain in a muscle | 
| myofasciitis | inflammation of a muscle and its associated connective tissue | 
| myography | obtaining a record of the contraction of a muscle | 
| myolysis | breakdown of muscle | 
| myoma | tumor derived from muscle | 
| myomalacia | softening of muscle | 
| myomectomy | removal of a tumor derived from muscle (in the uterine wall) | 
| myoplasty | surgical modification of a muscle | 
| myorrhaphy | surgical repair of a muscle | 
| myosarcoma | cancer derived from muscle tissue | 
| myosclerosis | hardening of muscle | 
| myositis | inflammation of muscle | 
| myospasm | involuntary contraction of muscle | 
| myotomy | cutting into a muscle | 
| neuromuscular | pertaining to the nervous system and muscles | 
| occipital | skull bone at the back of the head, next to (and attaches to) the cervical spine | 
| orthotic | device to straighten the foot or leg | 
| ossification | the process of making bone | 
| ostalgia | pain in the bones | 
| ostectomy | surgical removal of a bone | 
| osteitis | inflammation of a bone | 
| osteoarthritis | inflammation of bones and the joint formed by those bones | 
| osteoblast | rapidly dividing cell of bone (responsible for bone formation) | 
| osteocarcinoma | cancer derived from bone tissue | 
| osteochondritis | inflammation of bone and its associated cartilage | 
| osteochondroma | a tumor derived from bone and cartilage | 
| osteoclasia | abnormal breakdown of bone | 
| osteoclast | cell which breaks down bone | 
| osteodynia | pain in a bone | 
| osteogenesis | the process of forming bone | 
| osteolysis | the process of breaking down bone | 
| osteomalacia | abnormal softening of bone | 
| osteomyelitis | inflammation of the bone marrow | 
| osteon | microscopic anatomical unit of bone | 
| osteopathy | disease of the bone | 
| osteopenia | abnormal reduction in bone tissue (sign of osteoporosis) | 
| osteoplasty | surgical modfication of a bone | 
| osteoporosis | disease resulting in an abnormal number of holes in bone | 
| osteonecrosis | death of bone tissue | 
| osteosarcoma | cancerous tumor derived from bone tissue | 
| osteosclerosis | hardening of bone | 
| pectoral | pertaining to the chest | 
| pelvis | bone of the lower abdomen (hip bone) which results from the fusion of six bones (three on each side) | 
| perimysium | a connective tissue sheath of muscle that surrounds a bundle of muscle fibers (fascia) | 
| periosteum | membrane surrounding the bone | 
| phalanges | fingers and toes | 
| pollex | the thumb | 
| polydactyly | too many fingers (i.e. more than five on a hand) | 
| polymyositis | inflammation of many muscles | 
| pronation | turning the back of the hand facing forward; lying face down | 
| rhabdomyolysis | abnormal breakdown of skeletal muscle | 
| sarcolemma | the cell membrane surrounding a muscle cell | 
| sarcomere | repeating microscopic anatomical unit of striated muscle | 
| sarcoplasm | cytoplasm of a muscle cell | 
| scoliosis | abnormal curvature of the vertebrae (side-to-side curvature) | 
| sphincter | band of muscle surrounding an opening | 
| spine | bones of the back; vertebrae | 
| spondylitis | inflammation of the vertebrae | 
| spondyloarthropathy | disease of the joints between vertebrae | 
| spondylodynia | pain in the vertebrae | 
| spondylolisthesis | abnormal slippage of the vertebrae past one another | 
| spondylolysis | abnormal breakdown of the vertebrae | 
| spondylomalacia | abnormal softening of the vertebrae | 
| spondylosis | disease of the vertebrae | 
| sprain | injury to ligaments | 
| stenosis | abnormal narrowing of an opening | 
| sternotomy | cutting into the sternum (breastbone) | 
| sternum | breastbone; bone that ribs attach to | 
| strain | injury to a muscle or its tendon | 
| subluxation | dislocation of a joint | 
| sulcus | groove in a muscle | 
| supination | turning the palm of the hand facing forward; lying face up | 
| synarthrotic | immovable joint | 
| syncytium | cells which join together to make a large, multinucleated cell (as in skeletal muscle) | 
| syndactyly | abnormal joining of fingers | 
| synergist | muscle which aids an agonist muscle in its normal function | 
| talipes equinovarus | clubfoot | 
| tarsal | pertaining to the ankle | 
| tarsalgia | pain in the ankle | 
| tarsectomy | surgical removal of a tarsal bone | 
| tarsitis | inflammation of the ankle | 
| tarsoclasia | breakdown of an ankle bone | 
| tarsoptosis | condition of tarsal bones sagging; "flat feet" or "fallen arches" | 
| tenalgia | pain in a tendon | 
| tendectomy | surgical removal of a tendon | 
| tendinitis | inflammation of a tendon | 
| tendodesis | tendons bound together by a disease process | 
| tendolysis | breakdown of a tendon | 
| tendon | a band of connective tissue connecting muscle to bone | 
| tendonitis | inflammation of a tendon | 
| tendoplasty | surgical modification of a tendon | 
| tenodynia | pain in a tendon | 
| tenolysis | breakdown of a tendon | 
| tenoplasty | surgical modification of a tendon | 
| tenorrhaphy | surgical repair of a tendon | 
| tenotomy | cutting into a tendon | 
| thoracic | pertaining to the chest | 
| tibia | bone of the lower extremity; larger of the two leg bones | 
| tibialgia | pain in the tibia | 
| tomography | technique using low-dose X-rays from many angles to visualize a body part | 
| tonograph | record of muscle contraction | 
| torticollis | abnormal contraction of the neck on one side | 
| trochanter | prominent knob on the femur (bone of the thigh) which forms from the attachment of muscles | 
| trochlea | "pulley": bony structure which acts or looks like a pulley | 
| tubercle | small bump on bone ("little potato") | 
| tuberosity | bump on bone | 
| valgum | abnormally close knees (genu valgum = "knock-knees") | 
| varum | abnormally distant knees (genu varum = "bow-legged") | 
| vertebra | bone of the spinal column | 
| zygomatic | bone of the face |