n.
Pronunciation: ' mas- ˌ to ̇ id
Function: adjective
Etymology: New Latin mastoides resembling a nipple, mastoid, from Greek mastoeid ē s, from mastos breast
Date: 1732
1 : being the process of the temporal bone behind the ear also : being any of several bony elements that occupy a similar position in the skull of lower vertebrates
2 : of, relating to, or occurring in the region of the mastoid process