Definition of mesocoel in US English:

mesocoel

(also mesocele, mesocoele)

noun

  • 1Anatomy and Zoology. In forms mesocele, mesocoele. The cerebral aqueduct or its embryonic precursor. rare.

  • 2Zoology. The middle division of a tripartite coelom; (in hemichordates) the coelomic compartment of the mesosoma or collar; (in echinoderms) the part of the coelom forming the water-vascular system.

Origin

Late 19th century. From meso- + -coele, in sense 1 after mesocoelia.

Pronunciation

mesocoel

/ˈmɛsə(ʊ)siːl/