hydro

[hahy-droh]
noun, plural hy·dros for 2, 3.
  1. Informal. hydroelectric power.
  2. Informal. hydroplane.
  3. British.
    1. a bathhouse, hotel, or resort catering to people taking mineral-water health cures; spa.
    2. an establishment furnishing hydrotherapy.
adjective
  1. Informal. of, relating to, or furnishing water, water power, or hydroelectricity: funds for new hydro projects.

Origin of hydro

1880–85; by shortening of compounds with hydro-1 (cf. -o); (def 4) hydro-1 analyzed as an adj.

hydro-

1
  1. a combining form meaning “water,” used in the formation of compound words: hydroplane; hydrogen.
Also especially before a vowel, hydr-1.

Origin of hydro-

1
< Greek, combining form of hýdōr water

hydro-

2
  1. a combining form representing hydrogen in compound words, denoting especially a combination of hydrogen with some negative element or radical: hydrobromic.
Also especially before a vowel, hydr-2.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for hydro

Historical Examples of hydro


British Dictionary definitions for hydro

hydro

1
noun plural -dros
  1. British (esp formerly) a hotel or resort, often near a spa, offering facilities for hydropathic treatment

hydro

2
adjective
  1. short for hydroelectric
noun
  1. a Canadian name for electricity when it is supplied to a residence, business, institution, etc

Hydro

noun
  1. (esp in Canada) a hydroelectric power company or board

hydro-

sometimes before a vowel hydr-

combining form
  1. indicating or denoting water, liquid, or fluidhydrolysis; hydrodynamics
  2. indicating the presence of hydrogen in a chemical compoundhydrochloric acid
  3. indicating a hydroidhydrozoan

Word Origin for hydro-

from Greek hudōr water
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hydro

short for hydroelectric, from 1916.

hydro-

before vowels hydr-, word-forming element meaning "water," from Greek hydro-, comb. form of hydor "water" (see water (n.1)). Also sometimes a comb. form of hydrogen.

Online Etymology Dictionary, © 2010 Douglas Harper

hydro in Medicine

hydro-

pref.
  1. Water; liquid:hydrocephalus.
  2. Hydrogen:hydrochloride.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

hydro in Science

hydro-

  1. A prefix that means: “water” (as in hydroelectric) or “hydrogen,” (as in hydrochloride).
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.