The common cavity into which the intestinal, genital, and urinary tracts open in vertebrates such as fish, reptiles, birds, and some primitive mammals.

• 泄殖腔脊椎动物（如鱼、爬行动物、鸟和某些低级哺乳动物）的肠道、生殖道和泌尿道口通往的共用体腔