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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use jellyfish in a sentence
Scientists have used viruses to insert a green fluorescent protein found in jellyfish into mouse brains, causing neurons to light up during learning.How technology can let us see and manipulate memories | Joshua Sariñana | August 25, 2021 | MIT Technology Review
After the rocket touched back down on the landing pad, three parachutes erupted from the capsule and hovered above it like gigantic blue and red jellyfish as the vehicle landed in a puff of dust.Blue Origin brought the first official tourists to space | Claire Maldarelli | July 20, 2021 | Popular-Science
He’s out on the beach over a ball, near those wooden picket beach fences, on a downslope toward the waves and jellyfish.At a breezy PGA, normalcy beckoned — in the galleries, if not the top of the leader board | Chuck Culpepper | May 21, 2021 | Washington Post
That’s because, among animals, jellyfish are evolutionarily about as far away as you can get from mammals.Sleep Evolved Before Brains. Hydras Are Living Proof. | Veronique Greenwood | May 18, 2021 | Quanta Magazine
The evidence for sleep in creatures with minimal nervous systems seemed to reach a new high about five years ago with studies of jellyfish.Sleep Evolved Before Brains. Hydras Are Living Proof. | Veronique Greenwood | May 18, 2021 | Quanta Magazine
His first feature film, jellyfish Eyes, debuted last year and was set in a town near a threatening nuclear power plant.
In April, Murakami released his film jellyfish Eyes, inspired by “a manga called GeGeGe no Kitaro” from the 1960s.
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.
"He is a fair sample of some of the human jellyfish I have found hidden away in odd corners on this coast," stated Captain Mayo.Blow The Man Down | Holman Day
The children's mother told them that the whale is the largest of all animals, and that it lives on little jellyfish.Stories of California | Ella M. Sexton
By the time he was twenty-seven the only living thing that could be said to have served him as a model was the jellyfish.
Now the jellyfish pursues a most amiable theory of life, being harmless, humorous, and decorative.
Perhaps because, after all, no man ever quite achieves complete resemblance to a jellyfish.
British Dictionary definitions for jellyfish
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012