What does "jellyfish" mean?
An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance.
Jellyfish
/ˈd͡ʒɛliˌfɪʃ/ noun
noun ·Moderate ·College level
Meaning at a glance
- Primary sense: An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance.
- Grammar: jellyfish is listed as noun.
- Nearest alternatives: baby, big baby, chicken, chicken liver.
- Useful contrasts: anemones, brave person, courageous person.
- Usage evidence: These creatures evolved from simpler organisms like jellyfish.
How to use "jellyfish"
- Start with the primary definition, then check the part of speech before placing the word in a sentence.
- Compare nearby synonyms to make sure "jellyfish" carries the exact meaning, tone, and strength you need.
- Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.
Meaning check
- Does the word fit the sentence's grammar?
- Does it match the intended tone rather than only the dictionary definition?
- Would a simpler synonym be clearer for the reader?
- Is there enough surrounding context to prevent ambiguity?
Source and review context
This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "jellyfish" in a final draft.
If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.
Before you rely on this definition
Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "jellyfish" as the right word for your sentence.
If your draft is formal, technical, persuasive, or sensitive, compare "jellyfish" with a nearby alternative so the final choice matches both meaning and reader expectation.
Compare nearby meanings
- Use synonyms when you need a softer, stronger, simpler, or more specific word.
- Use antonyms to check the boundary of the meaning and avoid accidental contrast.
- Use the example sentence to confirm the word behaves naturally in context.
- Keep the original wording when a replacement adds complexity without improving precision.
Definition decision workflow
1. Identify the role
Check whether "jellyfish" is acting as noun in your sentence. A definition is only useful when the grammar matches the way the word is being used.
2. Test the nearest option
Compare it with "baby" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.
3. Confirm with context
Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.
Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.
Final meaning check
Before publishing a sentence with "jellyfish", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.
When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.
Definitions
Noun
- 1 An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance. countable, uncountable
"A recent study focused on the enzymatic and cytotoxic functions of jellyfish metalloproteases and identified diverse proteolytic effects including gelatinolytic, caseinolytic, and fibrinolytic activities."
- 2 any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans wordnet
- 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. countable, uncountable
- 4 large siphonophore having a bladderlike float and stinging tentacles wordnet
- 5 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. countable, especially, uncountable
Show 2 more definitions
- 6 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). countable, uncountable
- 7 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. countable, uncountable
Synonyms
All synonymsAntonyms
Example
"These creatures evolved from simpler organisms like jellyfish."
Common questions
What is a synonym for "jellyfish"?
Common synonyms include: baby, big baby, chicken, chicken liver, chilopoda, chordata.
How do you use "jellyfish" in a sentence?
These creatures evolved from simpler organisms like jellyfish.
How do you pronounce "jellyfish"?
Pronounced /ˈd͡ʒɛliˌfɪʃ/.
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-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.