凝ぎょう塊かい

noun, noun which may take the genitive case particle 'no'

clot; coagulated mass

Technical or medical term for a solid mass formed from liquid, especially blood. Also used as a no-adjective.

• 血けっ管かん内ないに凝ぎょう塊かいができると危き険けんです。

  It is dangerous if a clot forms inside a blood vessel.