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。

  Try touching the mastoid process behind your ear.

• 乳にゅう様よう突とっ起き炎えんは中ちゅう耳じ炎えんの合がっ併ぺい症しょうとして起おこることがあります。

  Mastoiditis can occur as a complication of otitis media.