- any of various marine coelenterates of a soft, gelatinous structure, especially one with an umbrellalike body and long, trailing tentacles; medusa.
- Informal. a person without strong resolve or stamina; an indecisive or weak person.
Origin of jellyfish
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for jellyfish
His first feature film, Jellyfish Eyes, debuted last year and was set in a town near a threatening nuclear power plant.Takashi Murakami’s Art From Disaster
November 28, 2014
Fish are too smart, big, fast, and numerous for jellyfish to come anywhere close to getting an upper hand.
Does the abundance of jellyfish in the ocean pose a threat to us?
And so, quietly, notch by notch, jellyfish continue to inherit damaged ecosystems.
Jellyfish blooms are the visible evidence that something is out of balance.
In fact, animals like jellyfish and worms are lungs all over.A Handbook of Health
Normally a jellyfish has its parts in four or multiples of four.
It is of interest to consider a common animal like the jellyfish Aurelia.
He was using the jellyfish as an example of a life form all but invisible.The Common Man
Guy McCord (AKA Dallas McCord Reynolds)
Just like jellyfish, they will not stand any rough handling.Ben Burton
W. H. G. Kingston
- any marine medusoid coelenterate of the class Scyphozoa, having a gelatinous umbrella-shaped body with trailing tentacles
- any other medusoid coelenterate
- informal a weak indecisive person
Word Origin and History for jellyfish
Online Etymology Dictionary, © 2010 Douglas Harper
- Any of numerous marine coelenterates of the class Scyphozoa, some poisonous species of which, notably the Portuguese man-of-war, produce a toxin that can be injected into the skin by nematocysts on the tentacles, causing linear wheals.
- Any of various similar or related coelenterates.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.