Medical Dictionary

osteoarthritis

noun os·teo·ar·thri·tis \ˌäs-tē-ō-är-ˈthrīt-əs\
plural os·teo·ar·thrit·i·des \-ˈthrit-ə-ˌdēz\

Medical Definition of OSTEOARTHRITIS

:  arthritis typically with onset during middle or old age that is characterized by degenerative and sometimes hypertrophic changes in the bone and cartilage of one or more joints and a progressive wearing down of apposing joint surfaces with consequent distortion of joint position and is marked symptomatically especially by pain, swelling, and stiffness—abbreviation OA; called also degenerative arthritis, degenerative joint disease, hypertrophic arthritis; compare rheumatoid arthritis
os·teo·ar·thrit·ic \-ˈthrit-ik\ adjective

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