Placentalian.

Brit.

/ˌplas(ə)nˈteɪlɪə/, U.S.

/ˌplæs(ə)nˈteɪljə/,

/ˌplæs(ə)nˈteɪliə/

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

Etymology: < scientific Latin Placentalia ( C. L. Bonaparte Synopsis Vertebratorum Systematis(1837) 3), use as group name of neuter plural of placentalis , adjective (see placental adj.).

Zoology.

With singular agreement: a division of mammals comprising those in which the females develop a placenta, equivalent to the infraclass Eutheria. With plural agreement: placental mammals collectively; eutherians, as distinguished from marsupials and monotremes.

ΘΚΠ

the world > animals > mammals > group Placentalia > [noun]

Placentalia1842

Eutheria1881

1842 W. T. Brande Dict. Sci., Lit. & Art 931/1 Placentalia, the name of the primary division of the class Mammalia which includes the orders that have either a placenta or a vascular chorion.

1859 Proc. Royal Geogr. Soc. 3 159 Marsupialia enjoyed existence in Australia in times long past, and under forms as gigantic and remarkable as those Placentalia discovered in the European and Asiatic continents.

1887 Amer. Naturalist 21 491 The ova of Placentalia segment completely.

1903 Science 20 Nov. 668/1 The venous system [of the opossum]..exhibits profound differences from the venous system of the Placentalia.

2000 Proc. National Acad. Sci. U.S.A. 97 2648/2 It is very difficult to determine..how many of the various similarities shared by these taxa are simply primitive features of the crown group Placentalia.

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

单词	placentalia
释义	Placentalian. Brit. /ˌplas(ə)nˈteɪlɪə/, U.S. /ˌplæs(ə)nˈteɪljə/, /ˌplæs(ə)nˈteɪliə/ Origin: A borrowing from Latin. Etymon: Latin Placentalia. Etymology: < scientific Latin Placentalia ( C. L. Bonaparte Synopsis Vertebratorum Systematis(1837) 3), use as group name of neuter plural of placentalis , adjective (see placental adj.). Zoology. With singular agreement: a division of mammals comprising those in which the females develop a placenta, equivalent to the infraclass Eutheria. With plural agreement: placental mammals collectively; eutherians, as distinguished from marsupials and monotremes. ΘΚΠ the world > animals > mammals > group Placentalia > [noun] Placentalia1842 Eutheria1881 1842 W. T. Brande Dict. Sci., Lit. & Art 931/1 Placentalia, the name of the primary division of the class Mammalia which includes the orders that have either a placenta or a vascular chorion. 1859 Proc. Royal Geogr. Soc. 3 159 Marsupialia enjoyed existence in Australia in times long past, and under forms as gigantic and remarkable as those Placentalia discovered in the European and Asiatic continents. 1887 Amer. Naturalist 21 491 The ova of Placentalia segment completely. 1903 Science 20 Nov. 668/1 The venous system [of the opossum]..exhibits profound differences from the venous system of the Placentalia. 2000 Proc. National Acad. Sci. U.S.A. 97 2648/2 It is very difficult to determine..how many of the various similarities shared by these taxa are simply primitive features of the crown group Placentalia. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1842
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