Meaning

noun (Greek mythology) any of three winged sister monsters and the mortal Medusa who had live snakes for hair; a glance at Medusa turned the beholder to stone

originFrom Middle English gorgon, from Latin Gorgō, from Ancient Greek Γοργώ (Gorgṓ), from γοργός (gorgós, “terrible”). Possibly from the same root as the Sanskrit word "garğ" (गर्जन), which is defined as a guttural sound, similar to the growling of a beast, thus possibly originating as an onomatopoeia.

Etymology from Wiktionary, CC BY-SA 3.0