a combining form representing machine or mechanical in compound words: mechanoreceptor.
Also especially before a vowel, mechan-.
Origin of mechano-
< Greek mēchano-, combining form representing mēchanḗ; see machine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
word-forming element meaning "mechanics, mechanism," from Greek mekhano-, comb. form of mekhane (see machine (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper