variants: or hydro-

Definition of hydr-

1a : water hydrous hydroelectric
b : liquid hydrokinetic
2 : hydrogen : containing or combined with hydrogen hydrocarbon hydroxyl
3 : hydroid hydromedusa

History and Etymology for hydr-

Latin hydr-, hydro-, from Greek, from hydōr — more at water

Keep scrolling for more

Keep scrolling for more

More Definitions for hydr-

hydr-

prefix
variants: or hydro-

Kids Definition of hydr-

1 : water hydroelectric
2 : hydrogen hydrocarbon

Comments on hydr-

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

WORD OF THE DAY

friendly or mild

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

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

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!