Definitions

1. noun

A fluid-filled cavity or body space in an animal, especially one that contains organs or other internal structures.

“The coelom in some invertebrates is a crucial component of their body structure and function.”

2. noun

In embryonic development, the cavity that contains the developing organs and eventually gives rise to the body cavity of the adult organism.

“During embryogenesis, the coelom forms and separates the developing organs from the rest of the embryo.”