I. adjective Date: 1791 1. of, relating to, having, or occurring by means of a placenta 2. eutherian II. noun Date: 1839 a placental mammal ; eutherian

New Collegiate Dictionary. 2001.

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  • Placental — Pla*cen tal, a. 1. Of or pertaining to the placenta; having, or characterized by having, a placenta; as, a placental mammal. [1913 Webster] 2. (Zo[ o]l.) Of or pertaining to the Placentalia. [1913 Webster] …   The Collaborative International Dictionary of English

  • Placental — Pla*cen tal, n. (Zo[ o]l.) One of the Placentalia. [1913 Webster] …   The Collaborative International Dictionary of English

  • placental — (adj.) 1808, from Mod.L. placentalis, from placenta (see PLACENTA (Cf. placenta)) …   Etymology dictionary

  • placental — Relating to the placenta. * * * pla·cen·tal əl adj 1) of, relating to, having, involving, or produced by a placenta <placental lactogen> <placental defects> 2) of or relating to placental mammals placental n PLACENTAL MAMMAL * * *… …   Medical dictionary

  • placental — I noun mammals having a placenta; all mammals except monotremes and marsupials • Syn: ↑placental mammal, ↑eutherian, ↑eutherian mammal • Hypernyms: ↑mammal, ↑mammalian …   Useful english dictionary

  • placental — adjective relating to a placenta. ↘Zoology relating to or denoting mammals that possess a placenta; eutherian. noun Zoology a placental mammal …   English new terms dictionary

  • placental — placenta ► NOUN (pl. placentae or placentas) ▪ a flattened circular organ in the uterus of a pregnant mammal, nourishing and maintaining the fetus through the umbilical cord. DERIVATIVES placental adjective. ORIGIN Latin, from Greek plakous flat… …   English terms dictionary

  • Placental growth factor — or vascular endothelial growth factor related protein is a member of the VEGF sub family. PGF is its human gene.cite web | title = Entrez Gene: PGF placental growth factor, vascular endothelial growth factor related protein| url = http://www.ncbi …   Wikipedia

  • placental barrier — n a semipermeable membrane made up of placental tissues and limiting the kind and amount of material exchanged between mother and fetus <thiazides cross the placental barrier and appear in cord blood (Resident & Staff Physician)> * * * the… …   Medical dictionary

  • Placental cotyledon — Structure of the placenta, with a placental cotyledon marked in rectangle. Gray s subject #12 63 …   Wikipedia

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