D defs.my
Entry 2 senses Webster, 1913

Medusa

/mĭ'dū'sə/ · Me·du·sa · IPA /məˈduːsə/
01 n. The Gorgon; or one of the Gorgons whose hair was changed into serpents, after which all who looked upon her were turned into stone.
  1. 1.
    The Gorgon; or one of the Gorgons whose hair was changed into serpents, after which all who looked upon her were turned into stone.(Class. Myth.)
  2. 2.
    Any free swimming acaleph; a jellyfish.(Zool.)
Phrases & compounds
Medusa bud — one of the buds of a hydroid, destined to develop into a gonophore or medusa. See Athecata, and Gonotheca.
Medusa's head — An astrophyton