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 vertebrates2: of, relating to, or occurring in the region of the mastoid process