Sapphic (adj.)

c. 1500, "of or pertaining to Sappho," from French saphique, from Latin Sapphicus, from Greek Sapphikos "of Sappho," in reference to Sappho, poetess of the isle of Lesbos c. 600 B.C.E. Especially in reference to her characteristic meter; sense of "pertaining to sexual relations between women" is from 1890s (compare lesbian).