a fold of tissue that partly covers the entrance to the vagina of a virgin
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Hymen \Hy"men\, n. [Gr. "ymh`n skin, membrane.] (Anat.) A fold of muscous membrane often found at the orifice of the vagina in virgins; the vaginal membrane. It is usually torn by sexual intercourse. [1913 Webster +PJC]
Hymen \Hy"men\, n. [L., fr. Gr. ?.] 1. (Class Myth.) A fabulous deity; according to some, the son of Apollo and Urania, according to others, of Bacchus and Venus. He was the god of marriage, and presided over nuptial solemnities.
Till Hymen brought his love-delighted hour, There dwelt no joy in Eden's rosy bower. --Campbell.