A medical condition in which bone becomes hardened, smooth, and shiny like polished ivory, usually from arthritis or excessive friction.
From Latin ebur (ivory) + -ation (suffix forming abstract nouns). The term was coined in medical Latin to describe observable changes in joint diseases. Modern medicine inherited this terminology from Renaissance physicians.
When doctors first saw arthritic joints under early microscopes, they noticed the bone surfaces gleaming like ivory—'eburnation' is literally what happens when your joints polish themselves smooth from years of rubbing!
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