plural noun Classical Mythology.
three old sea goddesses who had but one eye and one tooth among them and were the protectors of their sisters the Gorgons.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Greek myth three aged sea deities, having only one eye and one tooth among them, guardians of their sisters, the Gorgons
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012