medusa(redirected from medusan)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
MedusaRegional drug slang for an inhalant.
medusa(pl. medusas, medusae) the jellyfish (medusoid) stage of the COELENTERATE life cycle, usually free-swimming and propelled by pulsations of the bell. Medusae usually reproduce sexually, giving rise to a POLYP stage from which the medusae are produced asexually Medusae form the dominant phase of the life history of members of the class Scyphozoa, but are often absent or of lesser importance in other classes of the phylum.
Medusa,in Greek mythology, a Gorgon who turned men to stone.
caput Medusae - (1) varicose veins radiating from the umbilicus; - (2) dilated ciliary arteries girdling the corneoscleral limbus in rubeosis iridis. Synonym(s): head of Medusa
head of Medusa - Synonym(s): caput Medusae
jellyfish; a colony of animals comprising a bell from which hang a number of filaments and tentacles. Called also hydromedusa. Inflict painful stings and can cause death, even of humans. See also hydrozoa.
medusa head colonies
colonies of Bacillus anthracis on agar have this appearance of being domes with a fringe of filaments.