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n. The outer membrane enclosing the embryo in reptiles, birds, and mammals. In placental mammals it contributes to the development of the placenta.

n. The protective and nutritive membrane in higher vertebrates that attaches the fetus to the uterus.

n. The outer case of an insect egg.

n. The outer membrane of seeds of plants.

n.

n. The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development.

n. The true skin, or cutis.

n. The outer membrane of seeds of plants.

n. In anatomy, the outermost fetal envelop; the external membrane which invests the embryo, forming in the higher vertebrates the outer layer of the bag of waters, and contributing to the formation of the placenta.

n. By analogy — The membrana putaminis or egg-pod of those eggs which have calcareous shells.

n. The external investment of the ovum of an insect, derived from the epithelial layer of the oviduct.

n. Same as corium.

n. In botany, the pulpy matter which fills the young ovule and is absorbed during development.

n. the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)

"Covering the external face of the amnion and lining the inner face of the chorion is a double membrane, _the allantois_."

sac   

chorion læve    chorion frondosum   

subchorionic    dechorionated    monochorionic   

woodworm    hobnail    killdeer    atrophic    ejaculatory    ormer    radicle    thought-force    cutwater    alveolar