English
mastoidal
From mastoid + -al.
Formed from mastoid + -al
Proto-Indo-European *meh₂d- ‘to be wet, to become wet’
Ancient Greek μᾰστός ‘a woman's breast’
Ancient Greek μᾰστοειδής ‘like a breast’
New Latin mastoīdēs ‘Shaped like a breast’
English mastoid
Today it means
adj mastoid
Language periods are conventional ranges, not dates for this word.
Etymograph / mastoidal