acoelousacelousadj.

Brit.

/eɪˈsiːləs/, U.S.

/eɪˈsiləs/

Forms: 1800s– acoelous, 1900s– acelous (U.S.).

Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Acoela , -ous suffix.

Etymology: < scientific Latin Acoela (see acoel n.) + -ous suffix.

Zoology.

Lacking an intestinal cavity; spec. of or relating to the group Acoela of simple flatworms having no distinct gut.In some glossaries confused with acoelomate adj.Acoelous flatworms were traditionally classified in the phylum Platyhelminthes, but recent studies have suggested that they may be a primitive group not closely related to other flatworms.

ΚΠ

1880 F. P. Pascoe Zool. Classif. 262 Acœlous, without an intestinal cavity.

1885 Encycl. Brit. XIX. 172/2 (caption) Plan of an Acœlous Turbellarian.

1907 Proc. National Acad. Sci. Philadelphia 59 549 The acœlous rhabdocoeles, in which the alimentary canal is altogether absent.

1969 Marine Biol. 4 267 (title) Reproductive biology life cycles and comparative early ontogeny of acelous turbellarians.

2002 S. J. Gould Struct. Evolutionary Theory iii. 183 Lamarck later discovered worms (the acoelous platyhelminths in modern terminology) without nerve cords.

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

单词	acoelous
释义	acoelousacelousadj. Brit. /eɪˈsiːləs/, U.S. /eɪˈsiləs/ Forms: 1800s– acoelous, 1900s– acelous (U.S.). Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Acoela , -ous suffix. Etymology: < scientific Latin Acoela (see acoel n.) + -ous suffix. Zoology. Lacking an intestinal cavity; spec. of or relating to the group Acoela of simple flatworms having no distinct gut.In some glossaries confused with acoelomate adj.Acoelous flatworms were traditionally classified in the phylum Platyhelminthes, but recent studies have suggested that they may be a primitive group not closely related to other flatworms. ΚΠ 1880 F. P. Pascoe Zool. Classif. 262 Acœlous, without an intestinal cavity. 1885 Encycl. Brit. XIX. 172/2 (caption) Plan of an Acœlous Turbellarian. 1907 Proc. National Acad. Sci. Philadelphia 59 549 The acœlous rhabdocoeles, in which the alimentary canal is altogether absent. 1969 Marine Biol. 4 267 (title) Reproductive biology life cycles and comparative early ontogeny of acelous turbellarians. 2002 S. J. Gould Struct. Evolutionary Theory iii. 183 Lamarck later discovered worms (the acoelous platyhelminths in modern terminology) without nerve cords. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < adj.1880
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