Dictionary
hy•drol•o•gy
Pronunciation: (hī-drol'u-jē), [key]—
n.
1. the science dealing with the occurrence, circulation, distribution, and properties of the waters of the earth and its atmosphere.
2. hydrogeology; geohydrology.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.