• WordNet 3.6
    • adj medusoid relating to or resembling a medusa
    • n medusoid one of two forms that coelenterates take: it is the free-swimming sexual phase in the life cycle of a coelenterate; in this phase it has a gelatinous umbrella-shaped body and tentacles
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Webster's Revised Unabridged Dictionary
    • a Medusoid (Zoöl) Like a medusa; having the fundamental structure of a medusa, but without a locomotive disk; -- said of the sessile gonophores of hydroids.
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Century Dictionary and Cyclopedia
    • medusoid Like a medusa; resembling a medusa in form or function; medusiform: as, a medusoid bud; the medusoid organization. Sometimes acalephoid.
    • n medusoid The medusiform generative bud or receptacle of the reproductive elements of a hydrozoan, whether it becomes detached or not. Such an organism constitutes the middle stage in the process of metagenesis. The gonophore may present every stage of development and degree of complication until it becomes medusiform or bell-shaped, when it is called a medusoid from its resemblance to a medusa or jelly-fish.
    • n medusoid Loosely, any medusa, medusidan, or medusoid organism.
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Chambers's Twentieth Century Dictionary
    • adjs Medusoid —also ns.
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Webster's Revised Unabridged Dictionary
Medusa, + -oid,
Chambers's Twentieth Century Dictionary
Gr., 'ruler,' fem.


In literature:

In other cases the medusoid is hypogenetic, medusoid producing medusoid.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various
The medusoid generation is suppressed in this genus.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
The most usual condition, however, is that in which sessile medusoid gonophores or sporosacs are produced.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 2" by Various
The jellyfish or medusoid body-form corresponds in general to an umbrella or bell.
"Elementary Zoology, Second Edition" by Vernon L. Kellogg

In news:

The jellyfish mimic, named Medusoid CALTECH AND HARVARD UNIVERSITY.
They then placed the "Medusoid" in a water bath and shot electrical currents across it, prompting the cells to expand and relax - similar to the methodical pulses seen in an actual jelly fish .