amnion

Definition

The innermost membrane of the fetal membranes of reptiles, birds, and mammals; the sac in which the embryo is suspended.

Etymology

From Latin amnion (“membrane around a fetus”), from Ancient Greek ἀμνίον (amníon).

Example Sentences

• "Near-synonym: amniotic sac"
• "He never seemed to mind, and after a while, she no longer felt self-conscious about languishing in the amnion of his office."