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单词 prostomial
释义

prostomialadj.

Brit. /prəʊˈstəʊmɪəl/, U.S. /proʊˈstoʊmiəl/
Origin: Formed within English, by derivation. Etymons: prostomium n., -al suffix1.
Etymology: < prostomium n. + -al suffix1.
Zoology.
Anterior to the mouth; esp. of or relating to the prostomium of an invertebrate.
ΘΚΠ
the world > animals > invertebrates > bodies or parts > [adjective] > relating to pre-oral region
prostomial1879
the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [adjective] > mouth
archaeostomatous1876
prostomial1879
prostomiate1886
1879 Philos. Trans. (Royal Soc.) 168 267 The prostomial lobe is short, and sunk within the buccal ring.
1908 F. R. Lillie Devel. of Chick 110 The mesoblast in the region in front of the primitive streak is known as gastral mesoblast, and in the region of the primitive streak as prostomial mesoblast.
1950 R. W. Miner Field Bk. Seashore Life xv. 836 The body-cavity [in Phoronis]..is divided into three segments, the upper or prostomial segment being lost during metamorphosis from the larval stage.
1963 R. P. Dales Annelids ii. 48 The tentacles of terebellids are prostomial in origin.
1994 R. D. Barnes Invertebr. Zool. (ed. 6) xi. 510/2 The prostomial sense organs [of polychaetes] usually consist of eyes, antennae, and ventrolateral palps.
This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).
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adj.1879
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