Placozoan.

Brit.

/ˌplakəˈzəʊə/, U.S.

/ˌplækəˈzoʊə/

Origin: A borrowing from Latin. Etymon: Latin Placozoa.

Etymology: < scientific Latin Placozoa, phylum name (K. G. Grell 1971, in Naturwissensch. Rundschau 24 160/2) < placo- placo- comb. form + -zoa -zoa comb. form.

Zoology.

With plural agreement: animals belonging to a minor phylum of tiny marine invertebrates which are the most primitive metazoans known, having a flattened body lacking bilateral symmetry and made up of two cell layers; placozoans. Also (occasionally) with singular agreement: this phylum.

ΚΠ

1979 Zoomorphologie 93 59 Trichoplax adhaerens F. E. Schulze (Placozoa) in the scanning electron microscope.

1983 Paleobiology 9 98 The Placozoa and Entoprocta are also small and inconspicuous and therefore poorly known.

1997 Proc. Royal Soc. B. 264 77 Primary sequence analyses..supported sister group relationships between the Scyphozoa and Cubozoa and between the Ctenophora and the Placozoa.

2002 Molecular Phylogenetics & Evol. 24 374 Homologs of this gene are known from Placozoa and several Cnidaria.

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

单词	placozoa
释义	Placozoan. Brit. /ˌplakəˈzəʊə/, U.S. /ˌplækəˈzoʊə/ Origin: A borrowing from Latin. Etymon: Latin Placozoa. Etymology: < scientific Latin Placozoa, phylum name (K. G. Grell 1971, in Naturwissensch. Rundschau 24 160/2) < placo- placo- comb. form + -zoa -zoa comb. form. Zoology. With plural agreement: animals belonging to a minor phylum of tiny marine invertebrates which are the most primitive metazoans known, having a flattened body lacking bilateral symmetry and made up of two cell layers; placozoans. Also (occasionally) with singular agreement: this phylum. ΚΠ 1979 Zoomorphologie 93 59 Trichoplax adhaerens F. E. Schulze (Placozoa) in the scanning electron microscope. 1983 Paleobiology 9 98 The Placozoa and Entoprocta are also small and inconspicuous and therefore poorly known. 1997 Proc. Royal Soc. B. 264 77 Primary sequence analyses..supported sister group relationships between the Scyphozoa and Cubozoa and between the Ctenophora and the Placozoa. 2002 Molecular Phylogenetics & Evol. 24 374 Homologs of this gene are known from Placozoa and several Cnidaria. This is a new entry (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1979
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