noun · 7 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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/ˈd͡ʒɛliˌfɪʃ/
US:Recorded audio is listed in the source snapshot.
rhymes with -ɛlifɪʃ
CMU ARPABET:JH EH1 L IY0 F IH2 SH
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: jelly, sea jelly
Antonyms: none provided
2
noun
Meaning 2
An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance.
Any of various species of cnidarians in the subphylum Medusozoa, including box jellyfish (class Cubozoa), true jellyfish (class Scyphozoa), stalked jellyfish (class Staurozoa), and certain hydrozoans.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: jelly, sea jelly
Antonyms: none provided
3
noun
Meaning 3
An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance.
Any of various species of cnidarians in the subphylum Medusozoa, including box jellyfish (class Cubozoa), true jellyfish (class Scyphozoa), stalked jellyfish (class Staurozoa), and certain hydrozoans.
The medusa phase of these animals rather than a younger life stage.
Definition source: English Wiktionary via Wiktextract
Usage: countable, especially, uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: jelly, sea jelly
Antonyms: none provided
4
noun
Meaning 4
An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance.
A ctenophore, a member of the phylum Ctenophora (comb jellies).
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: jelly, sea jelly
Antonyms: none provided
5
noun
Meaning 5
A sudoku technique involving possible cell locations for a digit, or pair, or triple, in uniquely four rows and four columns only. This allows for the elimination of candidates around the grid.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
noun
Meaning 6
any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: coelenterate, cnidarian
Narrower terms: Aegina, Chrysaora quinquecirrha
7
noun
Meaning 7
large siphonophore having a bladderlike float and stinging tentacles
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: Portuguese man-of-war, man-of-war
Antonyms: none provided
Broader terms: siphonophore
History
Etymology
Etymology tree Proto-Indo-European *gel- Latin gelū Proto-Indo-European *-h2 Proto-Indo-European *-éh2 Proto-Indo-European *-yéti Proto-Indo-European *-eh2yéti Proto-Indo-European *-h2tiinflu. Proto-Italic *-ājō Proto-Italic *-āō Latin -ō Latin gelō ▲ Proto-Indo-European *-éh2 Proto-Indo-European *-tós Proto-Indo-European *-eh2tos Proto-Italic *-ātos Latin -ātus Latin -āta Early Medieval Latin gelāta Old French geleebor. Middle English gele English jelly Proto-Indo-European *péysks Proto-Germanic *fiskaz Proto-West Germanic *fisk Old English fisċ Middle English fisch English fish English jellyfish From jelly + fish. From being an aquatic creature (i.e. fish) that is gelatinous (“jelly”). Despite the name, jellyfish are not biologically classified as fish. The term appeared in the mid-19th century and displaced various older terms such as sea jelly (now much less common), blubber/sea blubber, nettle/sea nettle (both now referring to specific jellyfish species), and, in scientific literature, medusa.
Across languages
Translations
166 source translations are retained for this English entry.