# mastoid

> English word · Adjective · IPA /ˈmæ.stɔɪd/

## Definitions
1. Being the process of the temporal bone behind the ear.
2. Being the process of the temporal bone behind the ear.
3. Of or relating to the mastoid process of the temporal bone.
4. Shaped like a nipple.

## Etymology
Borrowed from New Latin mastoīdēs, from Ancient Greek μᾰστοειδής (măstoeidḗs, “like a breast”), from μᾰστός (măstós, “a woman's breast”) + -ειδής (-eidḗs, “-like, -oid”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/mastoid