A condition involving joint disease or degeneration, particularly referring to osteoarthritis or degenerative joint disease.
From Greek 'arthron' (joint) + '-osis' (condition or disease). The Greek root 'arthron' likely stems from Proto-Indo-European, relating to fitting or joining, while '-osis' became a standard medical suffix indicating a pathological state or abnormal condition.
Ancient Greek doctors used '-osis' to describe diseases they observed, creating a naming pattern so useful that modern medicine still uses it—you'll find '-osis' in sclerosis, necrosis, and psychosis, making it one of medicine's most productive word-building tools.
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