Metazoan.

Brit.

/ˌmɛtəˈzəʊə/, U.S.

/ˌmɛdəˈzoʊə/

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

Etymology: < scientific Latin Metazoa (Haeckel 1874, in Jenaische Zeitschr. f. Naturwissensch. 8 10) < meta- meta- prefix + -zoa -zoa comb. form, after Protozoa Protozoa n. Compare metazoon n.

Zoology.

(In form Metazoa; with plural (or occasionally singular) agreement) the multicellular animals, as a major division (now usually considered a subkingdom) of the animal kingdom; (with plural agreement, also metazoa) animals of this division (collectively or individually), metazoans.As originally conceived by Haeckel, one of the two great divisions of the animal kingdom (the other being Protozoa). Some zoologists now separate the sponges from other multicellular animals in a separate subkingdom Porifera, because of their relative lack of cellular specialization and tissue and organ differentiation.metazoon n. is used as the singular form.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > [noun]

Metazoa1874

1874 E. P. Wright tr. E. Haeckel in Q. Jrnl. Microsc. Sci. 14 150 The entire animal kingdom divides into two chief divisions: the older, lower group of the Protozoa (Urthiere), and the younger, higher group of the Metazoa (Darmthiere).

1874 Nature 11 June 115/2 The Metazoa are further divisible [in Haeckel's theory] into the Zoophyta..and the Bilateria (or bilaterally symmetrical animals).

1880 Mind 5 328 It is from this protoplasm that the entoderm of the so-called metazoa derives its origin.

1912 J. S. Huxley Individual in Animal Kingdom iii. 80 In all Metazoa there is..a shuffling and recombination of the chromosomes of the nucleus.

1921 J. A. Thomson Outl. Zool. (ed. 7) ix. 137 The Cœlentera..form a very large series of Acœlomate Metazoa.

1948 L. E. H. Whitby Nurses' Handbk. Hygiene (ed. 8) iv. 77 Infecting agents may be classified as bacteria, filter-passing viruses, fungi, protozoa, and metazoa.

1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) v. 58 By far the greatest number of species of animals..are multicellular animals or Metazoa.

1994 E. E. Ruppert & R. D. Barnes Invertebr. Zool. (ed. 6) xx. 1046 The Metazoa is probably a monophyletic taxon.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	metazoa
释义	Metazoan. Brit. /ˌmɛtəˈzəʊə/, U.S. /ˌmɛdəˈzoʊə/ Origin: A borrowing from Latin. Etymon: Latin Metazoa. Etymology: < scientific Latin Metazoa (Haeckel 1874, in Jenaische Zeitschr. f. Naturwissensch. 8 10) < meta- meta- prefix + -zoa -zoa comb. form, after Protozoa Protozoa n. Compare metazoon n. Zoology. (In form Metazoa; with plural (or occasionally singular) agreement) the multicellular animals, as a major division (now usually considered a subkingdom) of the animal kingdom; (with plural agreement, also metazoa) animals of this division (collectively or individually), metazoans.As originally conceived by Haeckel, one of the two great divisions of the animal kingdom (the other being Protozoa). Some zoologists now separate the sponges from other multicellular animals in a separate subkingdom Porifera, because of their relative lack of cellular specialization and tissue and organ differentiation.metazoon n. is used as the singular form. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > [noun] Metazoa1874 1874 E. P. Wright tr. E. Haeckel in Q. Jrnl. Microsc. Sci. 14 150 The entire animal kingdom divides into two chief divisions: the older, lower group of the Protozoa (Urthiere), and the younger, higher group of the Metazoa (Darmthiere). 1874 Nature 11 June 115/2 The Metazoa are further divisible [in Haeckel's theory] into the Zoophyta..and the Bilateria (or bilaterally symmetrical animals). 1880 Mind 5 328 It is from this protoplasm that the entoderm of the so-called metazoa derives its origin. 1912 J. S. Huxley Individual in Animal Kingdom iii. 80 In all Metazoa there is..a shuffling and recombination of the chromosomes of the nucleus. 1921 J. A. Thomson Outl. Zool. (ed. 7) ix. 137 The Cœlentera..form a very large series of Acœlomate Metazoa. 1948 L. E. H. Whitby Nurses' Handbk. Hygiene (ed. 8) iv. 77 Infecting agents may be classified as bacteria, filter-passing viruses, fungi, protozoa, and metazoa. 1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) v. 58 By far the greatest number of species of animals..are multicellular animals or Metazoa. 1994 E. E. Ruppert & R. D. Barnes Invertebr. Zool. (ed. 6) xx. 1046 The Metazoa is probably a monophyletic taxon. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1874
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