medusa

Etymology

The word for the jellyfish is borrowed from New Latin Medusa, the genus name that Linnaeus gave in allusion to the Gorgon's snaky hair, which the tentacles of some jellyfish resemble.^[2][3][4][5] The name is Latin Medūsa,^[2][6][7] from Ancient Greek Μέδουσα (Médousa), the name of the only mortal Gorgon.^[6][4] The Greek form is the same as the feminine present participle of μέδω (médō, “to protect, rule over”), so that it means "guardian" or "ruling";^{[6][3][8][7][5]} the OED thinks the name comes from the same Indo-European base whether or not it was formed from the verb, and was at least influenced by it.^[6] That base is Proto-Indo-European *med- (“to take appropriate measures”), the source of English mete.^[3][7][6] The Gorgon herself appears in English as Middle English Meduse in Gower's “Confessio Amantis”, before 1393.^[2][6][7]

Earliest recorded meaning

A jellyfish: 1752, in J. Hill's General Natural History.^[6] Etymonline and Barnhart date the word to 1758, as the genus name,^[3][2] and the Shorter Oxford and the ODE to the mid 18th century.^[4][9]

Semantic evolution

In Greek mythology Medusa was the only mortal one of the three Gorgons, with snakes for hair and a gaze that turned anyone who looked at her to stone; she was killed by Perseus, and her head was later fixed on the aegis or shield of Athena.^[6][4][3] In English the name was used from the late 14th century, also of any of the Gorgons and allusively of a terrifying or ugly woman.^[6][4] The Latinized form Medusa is recorded from 1594.^[2] The jellyfish sense, first used in New Latin as a genus name, was later narrowed in zoology to one of the two forms in which a cnidarian lives: the free-swimming, umbrella-shaped stage with a jelly-like body that produces eggs and sperm, as opposed to the fixed polyp.^[4][10][6] The plural is medusae or medusas.^[4][10][11] The adjectives medusan and medusal date from the mid 19th century.^[4]

Timeline

• before 1393 – Meduse, the Gorgon, in Gower's Confessio Amantis.^[2][6]
• 1594 – the form Medusa.^[2]
• 1752 – a jellyfish.^[6]
• 1758 – Medusa as Linnaeus's genus name.^[2][3]
• mid 19th century – the adjectives medusan and medusal.^[4]

Meanings

Noun

1. A jellyfish.^[10][11][6]
2. (zoology) The free-swimming form of a cnidarian, with a bell- or umbrella-shaped gelatinous body and trailing tentacles, which reproduces sexually, as opposed to the polyp.^[10][6][4]
3. (usually Medusa) A gorgon; a terrifying or ugly woman.^[4][6]

Word family

• medusan
• medusoid
• medusafish

Related words

• gorgon
• polyp
• mete

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
3. ^ a b c d e f Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f g h i j k Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
6. ^ a b c d e f g h i j k l m n o Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
7. ^ a b c d The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
8. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
9. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
10. ^ a b c d Collins English Dictionary (2023), Glasgow: HarperCollins
11. ^ a b Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster