planulationn.

Brit.

/ˌplanjᵿˈleɪʃn/, U.S.

/ˌplænjəˈleɪʃ(ə)n/

Origin: Formed within English, by derivation; partly modelled on a French lexical item. Etymons: planula n., -ation suffix.

Etymology: < planula n. + -ation suffix; in sense 1 after French planulation (L. Roule 1895, in Ann. des sci. nat. (Zool.) 18 106).

Zoology.

†1. The formation of a flattened embryo resembling a planula larva. Obsolete. rare.

ΚΠ

1895 Amer. Naturalist 29 185 M. Roule..regards the whole process of the spreading of the disc-shaped blastoderm as a process of planulation.

2. The formation or (esp.) the release of planulae by certain corals and other coelenterates.

ΚΠ

1968 Proc. Royal Soc. B. 169 338 Planulation is usually periodic, in most cases at some phase in the lunar cycle.

1985 Marine Ecol. Progress Ser. 23 153 (heading) Cycles of gametogenesis and planulation in the coral Pocillopora damicornis.

2002 Zool. Stud. 41 289/2 Planulae were released from 2 to 11 days after the new moon..and planulation revealed a well-defined lunar pattern.

This is a new entry (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	planulation
释义	planulationn. Brit. /ˌplanjᵿˈleɪʃn/, U.S. /ˌplænjəˈleɪʃ(ə)n/ Origin: Formed within English, by derivation; partly modelled on a French lexical item. Etymons: planula n., -ation suffix. Etymology: < planula n. + -ation suffix; in sense 1 after French planulation (L. Roule 1895, in Ann. des sci. nat. (Zool.) 18 106). Zoology. †1. The formation of a flattened embryo resembling a planula larva. Obsolete. rare. ΚΠ 1895 Amer. Naturalist 29 185 M. Roule..regards the whole process of the spreading of the disc-shaped blastoderm as a process of planulation. 2. The formation or (esp.) the release of planulae by certain corals and other coelenterates. ΚΠ 1968 Proc. Royal Soc. B. 169 338 Planulation is usually periodic, in most cases at some phase in the lunar cycle. 1985 Marine Ecol. Progress Ser. 23 153 (heading) Cycles of gametogenesis and planulation in the coral Pocillopora damicornis. 2002 Zool. Stud. 41 289/2 Planulae were released from 2 to 11 days after the new moon..and planulation revealed a well-defined lunar pattern. This is a new entry (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1895
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