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The Collaborative International Dictionary
covered-eyed medusae

Medusa \Me*du"sa\, n. [L., fr. Gr. ?.]

  1. (Class. Myth.) The Gorgon; or one of the Gorgons whose hair was changed into serpents, after which all who looked upon her were turned into stone.

  2. [pl. Medusae.] (Zo["o]l.) Any free swimming acaleph; a jellyfish. Note: The larger medus[ae] belong to the Discophora, and are sometimes called covered-eyed medus[ae]; others, known as naked-eyed medus[ae], belong to the Hydroidea, and are usually developed by budding from hydroids. See Discophora, Hydroidea, and Hydromedusa. Medusa bud (Zo["o]l.), one of the buds of a hydroid, destined to develop into a gonophore or medusa. See Athecata, and Gonotheca. Medusa's head.

    1. (Zo["o]l.) An astrophyton.

    2. (Astron.) A cluster of stars in the constellation Perseus. It contains the bright star Algol.