[ hee-lee-oh ]
/ ˈhi liˌoʊ /

noun, plural he·li·os. Informal.

a heliogram.
a heliograph.

Origin of helio

by shortening

Definition for helio (2 of 2)


a combining form meaning “sun,” used in the formation of compound words: heliolatry.

Also especially before a vowel, heli-.

Origin of helio-

< Greek, combining form of hḗlios sun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for helio

British Dictionary definitions for helio


before a vowel heli-

combining form

indicating the sunheliocentric; heliolithic

Word Origin for helio-

from Greek, from hēlios sun
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