Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun placental

1 sense of placental

Sense 1
placental, placental mammal, eutherian, eutherian mammal -- (mammals having a placenta; all mammals except monotremes and marsupials)
       => mammal, mammalian -- (any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk)

Antonyms of adj placental

1 sense of placental

Sense 1
placental (vs. aplacental) -- (pertaining to or having or occurring by means of a placenta; "all mammals except monotremes and marsupials are placental mammals")

aplacental (vs. placental) -- (having no placenta; "monotremes and marsupials are aplacental mammals")

Similarity of adj placental

1 sense of placental

Sense 1
placental (vs. aplacental) -- (pertaining to or having or occurring by means of a placenta; "all mammals except monotremes and marsupials are placental mammals")
       => transplacental -- (occurring through or by way of the placenta; "transplacental passage of nutrients")