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单词 acoel
释义

acoeln.adj.

Brit. /ˈeɪsiːl/, U.S. /ˈeɪˌsil/
Origin: A borrowing from Latin. Etymon: Latin Acoela.
Etymology: < scientific Latin Acoela (W. N. Uljanin 1870) < ancient Greek ἄκοιλος not hollow < ἀ- a- prefix6 + κοῖλος hollow (see cœlo- comb. form1); compare ancient Greek ἀκοίλιος without ducts, without stomach. Compare earlier acoelous adj.
Zoology.
A. n.
A member of the group Acoela of simple flatworms that have no distinct gut (see acoelous adj.).
ΚΠ
1937 Biol. Bull. 72 320 I had ample opportunity to witness the breeding habits of an acoel present in the aquaria there.
1968 B. T. Scheer & E. R. Jones in M. Florkin & B. T. Scheer Chem. Zool. II. iii. i. 297 Under certain conditions the plasmodium of acoels may become cellular while under other conditions it may revert to the syncytial or plasmodial condition.
2003 Science 13 June 1693/2 [He]..analyzed the DNA of a marine worm called the acoel, which morphologists had lumped with the parasitic flatworms.
B. adj.
Of or relating to the group Acoela.
ΚΠ
1939 L. H. Hyman in Bull. Bingham Oceanogr. Coll. 1 1 (title) Acoel and polyclad Turbellaria from Bermuda and the Sargassum.
1968 B. T. Scheer & E. R. Jones in M. Florkin & B. T. Scheer Chem. Zool. II. iii. i. 288 The acoel turbellarians are the most primitive members of the phylum.
1997 Nature 6 Nov. 31/1 The marine, worm-like X. bocki was first described as an acoel flatworm.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).
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n.adj.1937
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