aplacental


Also found in: Thesaurus, Medical.
Related to aplacental: ovoviviparous, viviparous

a·pla·cen·tal

 (ā′plə-sĕn′tl)
adj.
Having no placenta, as marsupials and monotremes.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

aplacental

(ˌeɪpləˈsɛntəl; ˌæplə-)
adj
(Zoology) (of monotremes and marsupials) having no placenta
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.aplacental - having no placentaaplacental - having no placenta; "monotremes and marsupials are aplacental mammals"
placental - pertaining to or having or occurring by means of a placenta; "all mammals except monotremes and marsupials are placental mammals"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Mentioned in ?
References in periodicals archive ?
On the basis of examination of a small number of reproductive tracts, velvet dogfish have been described as aplacental viviparous sharks that fit the type-II yolk-sac reproductive mode (in which several embryos with attached yolk sacs are contained in utero without uterine compartments) (Otake, 1990).
(2014) in embryos of placental and aplacental sharks, and is probably due to a lower content of inorganic than organic Hg, which has a high degree of affinity for the thiol groups of the muscle tissues (Soares et al., 2011).