Medusae are a form of coelenterate in which the body is shortened on its principal axis and broadened, sometimes greatly, in contrast with the hydroid or polyp.
Medusa is a board game that is based on a variant of Go. Medusa is purported to have been invented by Mark Berger in 1975. (See Medusa Board Game)
Medusa Bag is a generic term for large flexible barges used for transporting water. (See Medusa Bag) They are so called because of their likeness to jellyfish. (See above)
Medusa is Julie Brown, the starring actress of "Medusa: Dare To Be Truthful", a 1992 parody of the Madonna Blonde Ambition Tour documentary "Truth Or Dare".
Medusa (criminal organisation) is an obscure Balkans based terroristic and criminal organisation, suspected to control great part of the Balkans region's criminal activities as well as hiring mercenaries to various terrorist groups such as the UÇK or Al-Qaeda.