[ hee-muh-seel, hem-uh- ]
/ ˈhi məˌsil, ˈhɛm ə- /

noun Anatomy.

a series of interconnected spaces between tissues and organs through which blood flows freely, unconfined by veins or arteries, occurring in several invertebrate groups, especially mollusks and arthropods.

Origin of hemocoel

First recorded in 1830–40; hemo- + -coel
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019