第だい四よん胃い

noun

abomasum; fourth stomach of a ruminant

Technical term in veterinary anatomy and animal science. Also called rennet-bag or maw in English.

• 牛うしの第だい四よん胃いは、消しょう化か酵こう素そを分ぶん泌ぴつする。

  The cow's abomasum secretes digestive enzymes.