Definition of coelom in English:


nouncoeloms, coelomata

  • The principal body cavity in most animals, located between the intestinal canal and the body wall.

    • ‘In mellitids, the intestine is separated from the rest of the coelom by a well-defined wall of the peripheral ballast system.’
    • ‘The ophiuroid coelom is strongly reduced, particularly in comparison to other echinoderms.’
    • ‘The coelom extends into the rays, where the gonads are located.’
    • ‘Flatworms are unsegmented, bilaterally symmetrical worms that lack a coelom but that do have three germ layers.’
    • ‘Except in leeches, the coelom is partially subdivided by septa.’


Late 19th century from Greek koilōma ‘cavity’.