acoelomate


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acoelomate

 [a-se´lah-māt]
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.

acoelomate

(ə-sē′lə-māt′)
n.
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.

acoelomate

lacking 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
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References in periodicals archive ?
Early investigators suggested that the acoelomate platyhelminthes (flatworms) are basal to the bilaterian metazoans, but more recent phylogenetic analyses place them as basal members of the protostome spiralians (20, 21).
It has also been reported for crustaceans (Bell and Smith, 1993) and ascidians (Bell and Smith, 1994) but not, as yet, for acoelomate animals.
Because these acoelomate, planktonic animals lack both internal and external support systems, they are highly susceptible to injury.