Etymology

jellyfish

jel·ly·fish
J8E1L1L1Y4F4I1S1H4

Today it means: An almost transparent aquatic animal; any one of the acalephs, especially one of the larger species, having a jellylike appearance. Full definition →

English fish ← Middle English fisch ← Old English fisċ
Ask AI about its historyChatGPTClaudePerplexityGoogle AIGrok

The story

  1. Proto-Indo-European*gel-
  2. Latingelū
  3. Latingelō
  4. Early Medieval Latingelāta
  5. Old Frenchgelee
  6. Middle Englishgele
  7. Englishjelly
  8. Proto-Indo-European*péysks
  9. Proto-Germanic*fiskaz
  10. Proto-West Germanic*fisk
  11. Old Englishfisċ
  12. Middle Englishfisch
  13. Englishfish
  14. English todayjellyfish

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.

Etymology from Wiktionary, CC BY-SA 4.0.