Home › Words › A › allantogenesisallantogenesisallantogenesis means the formation and development of the allantois.EtymologyFrom allanto- + -genesis.nounThe formation and development of the allantoisDefinitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.allantoidal 69% match — Of or relating to the allantois. vs allantogenesis →amniogenesis 69% match — The formation and development of the amnion vs allantogenesis →allantoid 68% match — The allantois. vs allantogenesis →aortogenesis 63% match — The formation of tissue of the aorta, typically in the fetus vs allantogenesis →alveologenesis 63% match — The formation of the alveoli of the lungs vs allantogenesis →allantoic 62% match — Of, pertaining to or derived from the allantois. vs allantogenesis →allantochorion 62% match — the allantochorion is a fusion of the chorion with the allantois and ensures gas exchange of the fetus. vs allantogenesis →allantois 61% match — A sac, having a number of functions, that develops in the alimentary canal of the embryos of mammals, birds and reptiles. vs allantogenesis →