乳にゅう様よう突とっ起き

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).

• 耳みみの後うしろにある乳にゅう様よう突とっ起きを触さわってみてください。