- a combining form meaning “salt,” used in the formation of compound words (halophyte); sometimes specialized as a combining form of halogen (halothane).
Also especially before a vowel, hal-.
Origin of halo-
< Greek, combining form of háls salt
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
hali- or before a vowel hal-
- indicating salt or the seahalophyte
- relating to or containing a halogenhalothane
from Greek hals, hal- sea, salt
Word Origin and History for halo-
before vowels hal-, word-forming element meaning "salt, sea," from Greek hals (genitive halos) "a lump of salt, salt generally," in Homer, "the sea," from PIE *sal- "salt" (see salt (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper