n.
Pronunciation: ˌ ek-( ˌ )säs- ' t ō -s ə s
Function: noun
Inflected Form: plural -to · ses \ - ˌ s ē z \
Etymology: New Latin, from Greek exost ō sis, from ex out of + osteon bone ― more at EX- , OSSEOUS
Date: 1736
: a spur or bony outgrowth from a bone or the root of a tooth