名詞 eburnation:

1. a change that occurs in degenerative joint disease in which bone is converted into a dense smooth substance resembling ivory

e.bur.na.tion

n.（名詞）
Degeneration of bone into a hard, ivorylike mass, as that which occurs at the articular surfaces of bones in osteoarthritis.
骨質(zhì)象牙化：骨質(zhì)變質(zhì)為堅(jiān)硬的象牙狀的塊體，類似于患骨節(jié)炎時(shí)骨關(guān)節(jié)表面出現(xiàn)的情況

來源：
From Latin eburnus [ivory]
源自 拉丁語 eburnus [象牙]
from ebur * see ivory
源自 ebur *參見 ivory