amnigenous

[Lat. amnigenus = born in a river; amnigena = born of a river; amnis = a river, and gen , the root of gig no = to beget, to bear.] Born of or in a river. (Johnson.) ăm'-ni-ăn, ăm'-ni-os, s . [Gr. ἀμνίον (amnion) or ἄμνιον (amnion) = (1) a bowl in which the blood of victims was caught; (2) the membrane round the fœtus; the caul. Dimin. of ἀμνός (amnos) = a lamb.] mucous. Animal Physiol . The innermost membrane with which the fœtus in the womb is surrounded. In the development of the higher animals, the germinal membrane, at a very early period, separates into two layers: the external one serous, and the internal one The portion of the serous lamina immediately surrounding the embryo develops two prominent folds, one on each side, which, approaching, form two considerable reduplications, and ultimately unite into a closed sac. It is these uniting folds that are termed the amnion. (Todd & Bowman Physiol. Anat., vol. ii., pp. 384, 588, 606.) Liquor Amnii : An albuminous fluid filling the amniotic cavity. [AMNIOTIC CAVITY.] Bot. A clear and transparent fluid arising after fecundation in the centre of the ovulum, where it appears first in the form of a small drop or globule. In some cases it has no particular cuticle, but in others it is invested with a fine and filmy membrane, called by Mirbel, quintin ; and by Brown, embryonic sac.