auto-

auto-

1
Also, especially before a vowel, aut-.


Origin:
< Greek, combining form of autós self

Dictionary.com Unabridged

auto-

2
a combining form representing automobile in compound words: autocade.

Origin:
see auto

auto-

3
a combining form representing automatic in compound words: autoalarm; autofeed; autofocus . Sometimes also taken as an adjective: auto enlarger; auto stop control; auto dialer.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
auto- or (sometimes before a vowel) aut-
 
combining form
1.  self; same; of or by the same one: autobiography
2.  acting from or occurring within; self-caused: autohypnosis
3.  self-propelling; automatic: automobile
 
[from Greek autos self]
 
aut- or (sometimes before a vowel) aut-
 
combining form
 
[from Greek autos self]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

auto-
from Gk. auto- "self, one's own," combining form of autos "self, same," of unknown origin. Before a vowel, aut-; before an aspirate, auth-. In Gk. also used as a prefix to proper names, e.g. automelinna "Melinna herself." The opposite prefix would be allo-.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

auto- or aut-
pref.
Self; same: autogamy.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
auto-  
A prefix meaning "oneself," as in autoimmune, producing antibodies or immunity against oneself. It also means "by itself, automatic," as in autonomic, governing by itself.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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