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aplacental

[ ey-pluh-sen-tl, ap-luh- ]

adjective

, Zoology.
  1. having or forming no placenta, as the marsupials and monotremes.


aplacental

/ ˌæplə-; ˌeɪpləˈsɛntəl /

adjective

  1. (of monotremes and marsupials) having no placenta
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of aplacental1

First recorded in 1855–60; a- 6 + placental ( def )

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A place for everything and everything in its placeaplacophoran