[ hee-lee-oh ]

noun,plural he·li·os.Informal.
  1. a heliogram.

  2. a heliograph.

Origin of helio

By shortening

Words Nearby helio

Other definitions for helio- (2 of 2)


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

Origin of helio-

<Greek, combining form of hḗliossun
  • Also especially before a vowel, heli-.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use helio in a sentence

  • BREAKOUT MOMENT: Shaking her hips—Elvis be damned—during a too-hot-for-prime time samba with partner helio Castroneves in 2007.

    Breakout Blondes | Alison Prato | May 26, 2009 | THE DAILY BEAST
  • The helio was veiled in cloud, and there were no sounds of war.

    Story of the War in South Africa | Captain A. T. Mahan, U.S.N.
  • But this deep-set theoretic notion had to give way, and the helio-centric theory may, in its turn, have to give way also.

    Six Lectures on Light | John Tyndall
  • The helio was slanting downward, and was now less than five miles distant from the fast vanishing bus.

  • On Mason's order the government chauffeur swiftly heeled the helio about.

  • Thought images as well as words, Kriijorl had explained during their flight so long ago in the helio.

British Dictionary definitions for helio-


combining form
  1. indicating the sun: heliocentric; heliolithic

Origin of 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