planuloidadj.

Brit.

/ˈplanjᵿlɔɪd/, U.S.

/ˈplænjəˌlɔɪd/

Origin: Formed within English, by derivation. Etymons: planula n., -oid suffix.

Etymology: < planula n. + -oid suffix. Compare earlier planuliform adj.

Zoology.

Having the form of or resembling a planula; esp. designating a hypothetical ancestral metazoan of this form.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [adjective] > of form of embryo

planuliform1877

planuloid1890

1890 Cent. Dict. Planuloid, resembling a planula; planuliform.

1954 Q. Rev. Biol. 29 241/2 From a hypothetical, generalized, planuloid progenitor it is possible to derive each of the existing groups of the phylum Platyhelminthes.

1978 Nature 14 Dec. 702/2 That the first primitive herbivores and deposit feeders evolved from a pelagic planuloid ancestor is plausible.

1991 A. I. Tauber & L. Chernyak Metchnikoff & Origins of Immunol. i. Fig. 3 (caption) The introgressive development of Metchnikoff's parenchymella modeled after planuloid development.

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	planuloid
释义	planuloidadj. Brit. /ˈplanjᵿlɔɪd/, U.S. /ˈplænjəˌlɔɪd/ Origin: Formed within English, by derivation. Etymons: planula n., -oid suffix. Etymology: < planula n. + -oid suffix. Compare earlier planuliform adj. Zoology. Having the form of or resembling a planula; esp. designating a hypothetical ancestral metazoan of this form. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [adjective] > of form of embryo planuliform1877 planuloid1890 1890 Cent. Dict. Planuloid, resembling a planula; planuliform. 1954 Q. Rev. Biol. 29 241/2 From a hypothetical, generalized, planuloid progenitor it is possible to derive each of the existing groups of the phylum Platyhelminthes. 1978 Nature 14 Dec. 702/2 That the first primitive herbivores and deposit feeders evolved from a pelagic planuloid ancestor is plausible. 1991 A. I. Tauber & L. Chernyak Metchnikoff & Origins of Immunol. i. Fig. 3 (caption) The introgressive development of Metchnikoff's parenchymella modeled after planuloid development. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < adj.1890
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