acoelomateadj.n.

Brit.

/eɪˈsiːlə(ʊ)meɪt/, U.S.

/eɪˈsiləˌmeɪt/

Forms: 1800s– acoelomate, 1800s– acelomate (nonstandard, rare).

Origin: Formed within English, by derivation. Etymons: a- prefix⁶, cœlomate adj.

Etymology: < a- prefix⁶ + cœlomate adj. Compare earlier acoelomatous adj. and acoelous adj.

Zoology.

A. adj.

Of an animal or animal phylum: having no coelom or principal body cavity; not coelomate. Also: characteristic of such animals.

ΘΚΠ

the world > animals > invertebrates > bodies or parts > [adjective] > acoelomate

acoelomatous1874

acoelomate1885

1885 F. J. Bell Compar. Anat. & Physiol. 34 The acœlomate Metazoa are the sponges.

1921 J. A. Thomson Outl. Zool. (ed. 7) ix. 137 The Cœlentera..form a very large series of Acœlomate Metazoa.

1950 Philos. Trans. (Royal Soc.) B. 234 557 The retention [in the echinoderms]..of many primitive acoelomate features such as the multisynaptic sensory net.

1981 E. D. Hanson Understanding Evol. xiii. 458 Although they [sc. nemertines] are still acoelomate, they show important evolutionary innovations in their digestive and circulatory systems.

2002 New Scientist 2 Feb. 109/2 The relatively simple acoelomate worms..include the phylum Platyhelminthes: these are the flatworms.

B. n.

An acoelomate animal.

ΘΚΠ

the world > animals > invertebrates > [noun] > specific groups of

Mollusca1661

Acrita1823

microzoon1859

microzoary1863

malacozoic series1877

protostome1958

acoelomate1964

protostomian1968

1964 Q. Rev. Biol. 39 281/2 Pennak emphasizes the differences between fresh-water and related marine acoelomates.

1995 C. Nielsen Animal Evol. ix. 65 Many textbooks follow Hyman's (1951) division of the bilaterians into acoelomates, pseudocoelomates and coelomates.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).

单词	acoelomate
释义	acoelomateadj.n. Brit. /eɪˈsiːlə(ʊ)meɪt/, U.S. /eɪˈsiləˌmeɪt/ Forms: 1800s– acoelomate, 1800s– acelomate (nonstandard, rare). Origin: Formed within English, by derivation. Etymons: a- prefix⁶, cœlomate adj. Etymology: < a- prefix⁶ + cœlomate adj. Compare earlier acoelomatous adj. and acoelous adj. Zoology. A. adj. Of an animal or animal phylum: having no coelom or principal body cavity; not coelomate. Also: characteristic of such animals. ΘΚΠ the world > animals > invertebrates > bodies or parts > [adjective] > acoelomate acoelomatous1874 acoelomate1885 1885 F. J. Bell Compar. Anat. & Physiol. 34 The acœlomate Metazoa are the sponges. 1921 J. A. Thomson Outl. Zool. (ed. 7) ix. 137 The Cœlentera..form a very large series of Acœlomate Metazoa. 1950 Philos. Trans. (Royal Soc.) B. 234 557 The retention [in the echinoderms]..of many primitive acoelomate features such as the multisynaptic sensory net. 1981 E. D. Hanson Understanding Evol. xiii. 458 Although they [sc. nemertines] are still acoelomate, they show important evolutionary innovations in their digestive and circulatory systems. 2002 New Scientist 2 Feb. 109/2 The relatively simple acoelomate worms..include the phylum Platyhelminthes: these are the flatworms. B. n. An acoelomate animal. ΘΚΠ the world > animals > invertebrates > [noun] > specific groups of Mollusca1661 Acrita1823 microzoon1859 microzoary1863 malacozoic series1877 protostome1958 acoelomate1964 protostomian1968 1964 Q. Rev. Biol. 39 281/2 Pennak emphasizes the differences between fresh-water and related marine acoelomates. 1995 C. Nielsen Animal Evol. ix. 65 Many textbooks follow Hyman's (1951) division of the bilaterians into acoelomates, pseudocoelomates and coelomates. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < adj.n.1885
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