Main Entry: ¹mas·toid

Pronunciation: \ˈmas-ˌtȯid\

Function: adjective

Etymology: New Latin mastoides resembling a nipple, mastoid, from Greek mastoeidēs, 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