non-placentaladj.

Brit.

/ˌnɒnpləˈsɛntl/, U.S.

/ˌnɑnpləˈsɛn(t)l/

Origin: Formed within English, by derivation. Etymons: non- prefix, placental adj.

Etymology: < non- prefix + placental adj.

Not relating to or derived from the placenta; (Zoology) designating a mammal characterized by the lack of a placenta in the female during gestation (i.e. a monotreme or a marsupial).

ΚΠ

1858 Philos. Trans. 1857 (Royal Soc.) 147 349 These bodies..are wider apart upon the non-placental part of the chorion.

1877 Philos. Trans. 1876 (Royal Soc.) 166 584 A non-placental subclass of Mammalia.

1880 S. Haughton Six Lect. Physical Geogr. vi. 266 The non-placental Mammals contain two great subdivisions, viz., the Marsupials and the Monotremes.

1924 Proc. Royal Soc. B. 96 xxxiii His [sc. J. Symington's] paper on the cerebral commissures in the non-placental mammals..corrected certain current misapprehensions about the corpus callosum.

1966 Proc. National Acad. Sci. U.S.A. 55 994 (heading) Effect of estradiol on nonplacental DNA.

1994 Nucleic Acids Res. 22 4119/2 The enzyme activity has been detected and characterized in a wide variety of organisms ranging from bacteria to nonplacental mammals.

1996 Syst. Bot. 21 592/2 Initial fruit dehiscence along non-placental margin.

This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).

单词	non-placental
释义	non-placentaladj. Brit. /ˌnɒnpləˈsɛntl/, U.S. /ˌnɑnpləˈsɛn(t)l/ Origin: Formed within English, by derivation. Etymons: non- prefix, placental adj. Etymology: < non- prefix + placental adj. Not relating to or derived from the placenta; (Zoology) designating a mammal characterized by the lack of a placenta in the female during gestation (i.e. a monotreme or a marsupial). ΚΠ 1858 Philos. Trans. 1857 (Royal Soc.) 147 349 These bodies..are wider apart upon the non-placental part of the chorion. 1877 Philos. Trans. 1876 (Royal Soc.) 166 584 A non-placental subclass of Mammalia. 1880 S. Haughton Six Lect. Physical Geogr. vi. 266 The non-placental Mammals contain two great subdivisions, viz., the Marsupials and the Monotremes. 1924 Proc. Royal Soc. B. 96 xxxiii His [sc. J. Symington's] paper on the cerebral commissures in the non-placental mammals..corrected certain current misapprehensions about the corpus callosum. 1966 Proc. National Acad. Sci. U.S.A. 55 994 (heading) Effect of estradiol on nonplacental DNA. 1994 Nucleic Acids Res. 22 4119/2 The enzyme activity has been detected and characterized in a wide variety of organisms ranging from bacteria to nonplacental mammals. 1996 Syst. Bot. 21 592/2 Initial fruit dehiscence along non-placental margin. This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022). < adj.1858
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