Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Hydra

play
noun Hy·dra \ˈhī-drə\

Definition of Hydra

  1. 1 :  a many-headed serpent or monster in Greek mythology that was slain by Hercules and each head of which when cut off was replaced by two others

  2. 2 not capitalized :  a multifarious evil not to be overcome by a single effort

  3. 3 [Latin (genitive Hydrae), from Greek] :  a southern constellation of great length that lies south of Cancer, Sextans, Corvus, and Virgo and is represented on old maps by a serpent

  4. 4 not capitalized [New Latin, from Latin, Hydra] :  any of numerous small tubular freshwater hydrozoan polyps (Hydra and related genera) having at one end a mouth surrounded by tentacles



Origin of hydra

Middle English Ydra, from Latin Hydra, from Greek


First Known Use: 15th century


Hydra

play
geographical name Hy·dra \ˈhī-drə\

Definition of Hydra

  1. island Greece in S Aegean Sea off E coast of Peloponnese area 20 square miles (52 square kilometers), pop 2794

Hy·dri·ot play \ˈhī-drē-ət, -drē-ˌät\ or Hy·dri·ote play \-ˌōt, -ət\ noun


Variants of hydra

or ModGk Ídhra play \ˈēth-rä\

Learn More about hydra

  1. Medical Dictionary: Definition of "Hydra" Britannica.com: Encyclopedia article about "Hydra"


Seen and Heard

What made you want to look up Hydra? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 9, 2016

marked by high spirits and laughter

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

duvet pince-nez spindrift kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ