Bible Dictionaries
Implacentalia

Webster's Dictionary

(n. pl.) A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed.

Bibliography Information
Webster, Noah. Entry for 'Implacentalia'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​i/implacentalia.html. 1828.