- a combining form meaning “sleep,” “hypnosis,” used in the formation of compound words: hypnotherapy.
Also especially before a vowel, hypn-.
Origin of hypno-
< Greek hýpno(s) sleep; see Hypnos
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
before a vowel hypn-
- indicating sleephypnophobia
- relating to hypnosishypnotherapy
from Greek hupnos sleep
Word Origin and History for hypno-
word-forming element meaning "sleep," from Greek hypno-, comb. form of hypnos "sleep" (see somnolence).
Online Etymology Dictionary, © 2010 Douglas Harper
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.