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

Word History and Origins

Origin of aplacental¹

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