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1. without a coelom or body cavity.
2. an acoelomate animal.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
An animal that lacks a coelom. Acoelomates, which include flatworms and tapeworms, exhibit bilateral symmetry and have no body cavity between the gut and the epidermis.
a·coe′lo·mate (-lə-mĭt) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
acoelomatelacking a COELOM, the true body cavity. This occurs in some invertebrate groups such as coelenterates, platyhelminths, nemertines and nematodes.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005