A free-swimming sexual form of a coelenterate such as a jellyfish, typically having an umbrella-shaped body with stinging tentacles around the edge. In some species, medusae are a phase in the life cycle that alternates with a polypoid phase
The only mortal Gorgon, whom Perseus killed by cutting off her head
A fish of the cool temperate waters of the North Pacific, the young of which typically accompany jellyfishes and may feed on their tentacles
Resembling Medusa, especially with reference to her hair.
Zoology. Any of various echinoderms with multiply-branched arms, especially basket stars such as Gorgonocephalus; (formerly also) †the crinoid Cenocrinus asteria (formerly known as Pentacrinus caputmedusae) (obsolete).