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单词 placobranchoid
释义

placobranchoidadj.n.

Brit. /ˌplakə(ʊ)ˈbraŋkɔɪd/, U.S. /ˌplækəˈbræŋˌkɔɪd/, /ˌplækoʊˈbræŋˌkɔɪd/
Origin: A borrowing from Latin, combined with an English element; partly modelled on a Latin lexical item. Etymons: Latin Placobranchus , -oid suffix.
Etymology: < scientific Latin Placobranchus (see placobranchid n. and adj.) + -oid suffix. In later use after scientific Latin Placobranchoidea, superfamily name. Compare placobranchid n., placobranchid adj.
Zoology. rare.
A. adj.
Of, relating to, or designating members of the molluscan superfamily Placobranchoidea (also called Elysioidea, and included in the order Sacoglossa), comprising slug-like marine opisthobranch gastropods having plate-like gills covering the upper surface of the mantle.
ΚΠ
1895 I. K. Funk et al. Standard Dict. Eng. Lang. II. at Placo- Placobranchoid, a.
1996 Philos. Trans. (Royal Soc.) B. 351 113/2 The position of the anus and female genital opening close together in an anterior ciliated groove is a placobranchoid synapomorphy.
B. n.
A mollusc of the superfamily Placobranchoidea.
ΚΠ
1996 Philos. Trans. (Royal Soc.) B. 351 100/1 In many placobranchoids there is also a groove extending part or all the way across the foot sole.
This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).
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adj.n.1895
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