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Regional drug slang for an inhalant.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


(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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005


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
Medical Eponyms © Farlex 2012
References in periodicals archive ?
When the researchers set their creation free in an electrically conducting container of fluid and oscillated the voltage from zero volts to five, they shocked the Medusoid into swimming with synchronized contractions that mimic those of real jellyfish.
Erratic fluctutations in abundante of medusoid and ctenophore populations in two systems, Ligurian Sea and Benguela ecosystem: some examples.
The localization of FMRFamide and tubulin immunoreactivity was best followed through a developmental sequence starting with the just-budded ephyra of Aurelia since the two stained subumbrellar networks showed very different relationships with the locomotory musculature in the early medusoid forms.
The lack of a decline in arm muscle CS and ODH suggests either that deeper living species are utilizing arms for medusoid swimming, or that species at all depths utilize arms for activities, such as defense or prey capture, that require similar metabolic potential regardless of habitat depth.
10A) It then moved away from the submersible, using a slow medusoid locomotion.
Although the actual experimental treatment is the number of feedings per week, gastrovascular flow rate (the hypothetical physiological dose) is considered the predictor variable; morphological development relative to the timing of the sexual (medusoid) phase of the life cycle is considered the response variable.
Furthermore, the Anthozoa have a simpler life cycle than other Cnidaria, lacking the presumably derived medusoid stage that characterizes the Scyphozoa and the Hydrozoa.
With distinctive transparent bodies (above), the creature is often thought to be a jellyfish, but is actually a siphonophore - a colony of tiny specialised polyps and medusoids.
With distinctive transparent bodies, the creature is often thought to be a jellyfish, but is actually a siphonophore - a colony of tiny specialised polyps and medusoids.