noun, noun which may take the genitive case particle 'no'
mastoid process
Anatomical term for the bony prominence behind the ear. Used in medical contexts and as a no-adjective in phrases like 乳様突起炎 (mastoiditis).
耳の後ろにある乳様突起を触ってみてください。
Try touching the mastoid process behind your ear.
乳様突起炎は
Mastoiditis can occur as a complication of otitis media.