helio

US:USA pronunciation: respellingUSA pronunciation: respelling(hē′lē ō′)


WordReference Random House Unabridged Dictionary of American English © 2026
he•li•o  (hē′lē ō′),USA pronunciation n., pl. -li•os. [Informal.]
  1. Optics, Informal Termsa heliogram.
  2. Optics, Informal Termsa heliograph.
  • by shortening

helio-, 
  1. a combining form meaning "sun,'' used in the formation of compound words:heliolatry.
Also,[esp. before a vowel,] heli-. 
  • Greek, combining form of hé̄lios sun

WordReference Random House Learner's Dictionary of American English © 2026
-helio-, root. 
    1. -helio- comes from Greek, where it has the meaning "sun.'' This meaning is found in such words as: aphelion, helium, perihelion.

Collins Concise English Dictionary © HarperCollins Publishers::
helio-, (before a vowel)heli-
  1. indicating the sun: heliocentric, heliolithic
Etymology: from Greek, from hēlios sun
'helio' also found in these entries (note: many are not synonyms or translations):
heli- - helio- - heliocentric - heliodor - heliogram - heliograph - heliogravure - heliolatry - heliometer - heliopause - heliophyte - helioscope - heliosphere - heliostat - heliotaxis - heliotherapy - heliotrope - heliotropic - heliotropism - heliotype - heliozoan - helium - parhelion - pyrheliometer - spectroheliograph - spectrohelioscope - sun

Forum discussions with the word(s) "helio" in the title:


Look up "helio" at Merriam-Webster
Look up "helio" at dictionary.com
  • Go to Preferences page and choose from different actions for taps or mouse clicks.

In other languages: Spanish | French | Italian | Portuguese | Romanian | German | Dutch | Swedish | Russian | Polish | Czech | Greek | Turkish | Chinese | Japanese | Korean | Arabic

Advertisements
Advertisements
Report an inappropriate ad.
WordReference.com
WORD OF THE DAY
GET THE DAILY EMAIL!

Become a WordReference Supporter to view the site ad-free.