allantoic

/al-uhn-toh-ik/US // ˌæl ənˈtoʊ ɪk //

尿囊素,尿囊,尿囊炎,尿毒症

Definitions

adj.形容词 adjective

The last of these can be dismissed, in consequence of the recent discovery of an allantoic placenta in Perameles.
It was for a long time held that the Marsupials differed from all other mammals in having no allantoic placenta.
It implies on the whole that the Marsupials have sprung from a stock with an allantoic placenta.
More remarkable still is the development of a small allantoic placenta.
As the allantois increases in size and importance, the allantoic vessels are correspondingly developed.