a combining form meaning “rain,” used in the formation of compound words: hyetology.
Also especially before a vowel, hyet-.

Origin of hyeto-

combining form representing Greek hyetós rain, derivative of hýein to rain
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British Dictionary definitions for hyeto-


before a vowel hyet-

combining form

indicating rain

Word Origin for hyeto-

from Greek huetos
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