[ hahy-drol-uh-jee ]
/ haɪˈdrɒl ə dʒi /


the science dealing with the occurrence, circulation, distribution, and properties of the waters of the earth and its atmosphere.
hydrogeology; geohydrology.

Origin of hydrology

First recorded in 1755–65; hydro-1 + -logy

Related forms

hy·dro·log·ic [hahy-druh-loj-ik] /ˌhaɪ drəˈlɒdʒ ɪk/, hy·dro·log·i·cal, adjectivehy·dro·log·i·cal·ly, adverbhy·drol·o·gist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for hydrological


/ (haɪˈdrɒlədʒɪ) /


the study of the distribution, conservation, use, etc, of the water of the earth and its atmosphere, particularly at the land surface

Derived Forms

hydrologic (ˌhaɪdrəˈlɒdʒɪk) or hydrological, adjectivehydrologically, adverbhydrologist, noun
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

Science definitions for hydrological


[ hī-drŏlə-jē ]

The scientific study of the properties, distribution, and effects of water as a liquid, solid, or gas on the Earth's surface, in the soil and underlying rocks, and in the atmosphere.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.