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hydro
[ hahy-droh ]
/ ˈhaɪ droʊ /
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This shows grade level based on the word's complexity.
noun, plural hy·dros for 2, 3.
Informal. hydroelectric power.
Informal. hydroplane.
British.
- a bathhouse, hotel, or resort catering to people taking mineral-water health cures; spa.
- an establishment furnishing hydrotherapy.
adjective
Informal. of, relating to, or furnishing water, water power, or hydroelectricity: funds for new hydro projects.
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Words nearby hydro
Other definitions for hydro (2 of 3)
hydro-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
Other definitions for hydro (3 of 3)
hydro-2
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. 2023
How to use hydro in a sentence
British Dictionary definitions for hydro (1 of 4)
hydro1
/ (ˈhaɪdrəʊ) /
noun plural -dros
British (esp formerly) a hotel or resort, often near a spa, offering facilities for hydropathic treatment
British Dictionary definitions for hydro (2 of 4)
hydro2
/ (ˈhaɪdrəʊ) /
adjective
short for hydroelectric
noun
a Canadian name for electricity when it is supplied to a residence, business, institution, etc
British Dictionary definitions for hydro (3 of 4)
Hydro
/ (ˈhaɪdrəʊ) /
noun
(esp in Canada) a hydroelectric power company or board
British Dictionary definitions for hydro (4 of 4)
hydro-
sometimes before a vowel hydr-
combining form
indicating or denoting water, liquid, or fluidhydrolysis; hydrodynamics
indicating the presence of hydrogen in a chemical compoundhydrochloric acid
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
Scientific definitions for hydro
hydro-
A prefix that means: water (as in hydroelectric) or hydrogen, (as in hydrochloride).
The American Heritage® Science Dictionary
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