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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.

[New Latin Acoelōmata, group name : a- + Greek koilōma, koilōmat-, cavity; see coelom.]

a·coe′lo·mate (-lə-mĭt) adj.


(eɪˈsiːləˌmeɪt) biology
any animal without a body cavity, such as a flatworm
relating to an animal without a body cavity


(eɪˈsi ləˌmeɪt, ˌeɪ siˈloʊ mɪt)
1. lacking a body cavity or coelom.
2. any organism that lacks a cavity between the body wall and the digestive tract, as the flatworms, nemerteans, and jellyfishes.
[1875–80; a-6 + coelom + -ate1]
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L Sylow = a Norwegian mathematician) ZEE Yahtzee (the 'Yacht' Game) CAE caenozoic, glycaemia, muscae (eye floaters) CEA cease, conceal CEI ceiling, perceive, conceit, caducei CI cinematheque, glycine COE coelenterate, acoelomate SAE mucosae SE sepia, ellipses, paradisean, Barotse SEE seethe, aniseed, foresee SEY Seymouria (a fossil tetrapod), semseyite ([Pb.
Because planarians are acoelomate and do not have vascular systems, the steroid hormones might act with the autocrine or paracrine systems but not with the endocrine system.