Dictionary
im•pla•cen•tal
Pronunciation: (im"plu-sen'tl), [key]—
adj.
Zool.having no placenta, as a monotreme or marsupial.
—
n.
an implacental mammal.
Also,im•pla•cen•tatePronunciation: (im"plu-sen'tāt). [key]Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.