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Regional drug slang for an inhalant.


(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.


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.
References in periodicals archive ?
This month's Clip & Save Art Print, Perseus with the Head of Medusa, is considered his masterpiece.
Rice, whose book addresses her upbringing, and not her time in the White House, said she chose to write first about her childhood because she wanted people "to know that I didn't somehow come full-blown from the head of Medusa.
The living room has panels made up of red and green lines on the walls and a painted ceiling, with birds, sheep and a head of Medusa, who had snakes for hair and whose gaze could turn people to stone.