exostosis
noun
ex·os·to·sis
ˌek-(ˌ)sä-ˈstō-səs
plural exostoses
ˌek-(ˌ)sä-ˈstō-ˌsēz
: a spur or bony outgrowth from a bone or the root of a tooth
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Merriam-Webster unabridged
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