protocoelomaten.

Brit.

/ˌprəʊtə(ʊ)ˈsiːlə(ʊ)meɪt/, U.S.

/ˌproʊdoʊˈsiləˌmeɪt/

Origin: Formed within English, by compounding. Etymons: proto- comb. form, cœlomate n.

Etymology: < proto- comb. form + cœlomate n. Compare scientific Latin protocoelomata (see quot. 1884; used by later authors with different application).

Zoology. rare.

Originally: (A. S. Hyatt's name for) a member of a grade of primitive multicellular animals characterized by a simple central cavity with branching sacs (not now considered coelomic), comprising most or all of the sponges. Now: a metazoan animal considered to represent or resemble a common ancestor of coelomate phyla.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > [noun] > member of > member of Protocoelomata

protocoelomate1884

1884 A. S. Hyatt in Proc. Boston Soc. Nat. Hist. 113 Anatomically, the Sponges may be called Metazoa protocœlomata... We can readily transform a protocœlomate into a trochocœlomate by destroying the horizontal parts of the partitions.

1998 Genome Res. (Electronic ed.) 8 590 (caption) Tree A..reflects the conventional interpretation of metazoan phylogeny with nematodes as a ‘protocoelomate’ group basal to arthropods and humans.

Derivatives

† protocoelomatic adj. Obsolete rare Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 Cent. Dict. Protocœlomatic, of or pertaining to the Protocœlomata.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).

单词	protocoelomate
释义	protocoelomaten. Brit. /ˌprəʊtə(ʊ)ˈsiːlə(ʊ)meɪt/, U.S. /ˌproʊdoʊˈsiləˌmeɪt/ Origin: Formed within English, by compounding. Etymons: proto- comb. form, cœlomate n. Etymology: < proto- comb. form + cœlomate n. Compare scientific Latin protocoelomata (see quot. 1884; used by later authors with different application). Zoology. rare. Originally: (A. S. Hyatt's name for) a member of a grade of primitive multicellular animals characterized by a simple central cavity with branching sacs (not now considered coelomic), comprising most or all of the sponges. Now: a metazoan animal considered to represent or resemble a common ancestor of coelomate phyla. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > [noun] > member of > member of Protocoelomata protocoelomate1884 1884 A. S. Hyatt in Proc. Boston Soc. Nat. Hist. 113 Anatomically, the Sponges may be called Metazoa protocœlomata... We can readily transform a protocœlomate into a trochocœlomate by destroying the horizontal parts of the partitions. 1998 Genome Res. (Electronic ed.) 8 590 (caption) Tree A..reflects the conventional interpretation of metazoan phylogeny with nematodes as a ‘protocoelomate’ group basal to arthropods and humans. Derivatives † protocoelomatic adj. Obsolete rare Apparently only attested in dictionaries or glossaries. ΚΠ 1890 Cent. Dict. Protocœlomatic, of or pertaining to the Protocœlomata. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < n.1884
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