placentaryadj.n.
/pləˈsɛnt(ə)ri/, U.S. /pləˈsɛn(t)əri/ Now rare.
A. adj. Of or relating to a placenta or placentas; placental.
a. Anatomy and Zoology.In quot. 1864: (of classification) based primarily on the absence or presence of a placenta.
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the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > membranes, etc., of embryo or fetus > [adjective] > placenta
placentary1734
placental1785
diffuse1856
aplacental1859
zonary1881
the world > animals > mammals > group Placentalia > [adjective]
monodelphous1854
placentalian1857
placentary1864
monodelphian1869
monodelphic1883
1734 Med. Ess. & Observ. (Philos. Soc. Edinb.) II. 138 The uterine Arteries..must have inosculated with the placentary Vessels.
1799 J. Burns Anat. Gravid Uterus 210 When we attempt to raise it up, we draw out the placentary substance.
1858 Philos. Trans. 1857 (Royal Soc.) 147 347 (heading) Remarks on the value of placentary characters in the classification of the Mammalia.
1864 Webster's Amer. Dict. Eng. Lang. (at cited word) The placentary system of classification.
1991 Placenta 12 533 Maternal enteroviremia and faecal virus shedding without placental invasion, placentary damage being an unspecific consequence of infection.
b. Botany.
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the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having or relating to parts > of or having stamens or pistils > of or having style, pistil, or female parts > of or relating to or having a placenta
placental1791
placentary1839
placentiferous1878
placentigerous1890
1839 J. Lindley Introd. Bot. (ed. 3) 204 Uncertainty in the position of the placentary lines.
1857 A. Henfrey Elem. Course Bot. 121 When we open the ovary, in the way it is broken in shelling peas for the table, we find the placentary margins separate at the ventral suture.
1888 G. Henslow Origin Floral Structures xxx. 309 Orchis has an innumerable quantity [of ovules] arising by repeated chorisis of the original placentary cords.
1980 New Phytologist 86 323 The placentary papillae of the ovaries in Aptenia cordifolia and Platythyra haeckeliana..secrete slime containing polysaccharide and protein.
2000 Bot. Rev. (Nexis) 1 Apr. 155 This appears to show that the cords..are potentially marginal or placentary.
B. n.† 2. Zoology. A placental mammal, a eutherian. Obsolete. rare.
1. Botany. A placenta which bears a number of ovules. disused.
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1849 J. H. Balfour Man. Bot. §438 Some restrict the term placenta to the point of attachment of a single ovule, and call the union of placentas, bearing several ovules, placentaries or pistillary cords.
1900 B. D. Jackson Gloss. Bot. Terms 198/2 Placentary, a placenta which is long and narrow and bears many ovules.
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the world > animals > mammals > group Placentalia > [noun] > member of
placental1841
monodelph1842
Deciduata1866
monodelphian1873
deciduate1880
eutherian1880
placentary1890
1890 Cent. Dict. Placentary,..a member of the Placentalia; a placental.
This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).
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adj.n.1734