[医] 外生骨疣

[ noun ]
a benign outgrowth from a bone (usually covered with cartilage)
<noun.state>

Exostosis \Ex`os*to"sis\, n. [NL., fr. Gr. ?; ? out + ? bone:
cf. F ? exostose.]
1. (Med.) Any protuberance of a bone which is not natural; an
excrescence or morbid enlargement of a bone. --Coxe.

2. (Bot.) A knot formed upon or in the wood of trees by
disease.