- Informal. hydroelectric power.
- Informal. hydroplane.
- a bathhouse, hotel, or resort catering to people taking mineral-water health cures; spa.
- an establishment furnishing hydrotherapy.
- Informal. of, relating to, or furnishing water, water power, or hydroelectricity: funds for new hydro projects.
Origin of hydro
- 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
- 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
Hydro: relating to water: a combining form used as a prefix.Explanation of Terms Used in Entomology
John. B. Smith
The Norfolk suit and the false moustache are in her room at the hydro.Cleek, the Master Detective
Thomas W. Hanshew
This is done in a kind of wringing machine called a "hydro extractor."Clothing and Health
Harbrace and the hydro engineer jumped for the communications phone.The Thirst Quenchers
Designed to be used also as a hydro, with three step floats.
- British (esp formerly) a hotel or resort, often near a spa, offering facilities for hydropathic treatment
- short for hydroelectric
- a Canadian name for electricity when it is supplied to a residence, business, institution, etc
- (esp in Canada) a hydroelectric power company or board
sometimes before a vowel hydr-
- indicating or denoting water, liquid, or fluidhydrolysis; hydrodynamics
- indicating the presence of hydrogen in a chemical compoundhydrochloric acid
- indicating a hydroidhydrozoan
from Greek hudōr water
Word Origin and History for hydro
short for hydroelectric, from 1916.
Online Etymology Dictionary, © 2010 Douglas Harper
- Water; liquid:hydrocephalus.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A prefix that means: water (as in hydroelectric) or hydrogen, (as in hydrochloride).