hydro-

hydro-

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


Origin:
< Greek, combining form of hýdōr water

Dictionary.com Unabridged

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 Dictionary, © Random House, Inc. 2014.
Cite This Source Link To hydro-
Collins
World English Dictionary
hydro- or (sometimes before a vowel) hydr-
 
combining form
1.  indicating or denoting water, liquid, or fluid: hydrolysis; hydrodynamics
2.  indicating the presence of hydrogen in a chemical compound: hydrochloric acid
3.  indicating a hydroid: hydrozoan
 
[from Greek hudōr water]
 
hydr- or (sometimes before a vowel) hydr-
 
combining form
 
[from Greek hudōr water]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

hydro- or hydr-
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.
Cite This Source
American Heritage
Science Dictionary
hydro-  
A prefix that means: "water" (as in hydroelectric) or "hydrogen," (as in hydrochloride).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature