[uh-ton-ik, ey-ton-]
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  1. Grammar. an unaccented word, syllable, or sound.

Origin of atonic

1720–30; a-6 + tonic; in pathology sense, aton(y) + -ic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for atonic

Historical Examples of atonic

British Dictionary definitions for atonic


  1. (of a syllable, word, etc) carrying no stress; unaccented
  2. pathol lacking body or muscle tone
  1. an unaccented or unstressed syllable, word, etc, such as for in food for thought
Derived Formsatonicity (ˌætəˈnɪsɪtɪ, ˌeɪtəʊ-), noun

Word Origin for atonic

C18: from Latin atonicus, from Greek atonos lacking tone; see atony
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

atonic in Medicine


  1. Relating to, caused by, or exhibiting lack of muscle tone.
Related formsat′o•nici•ty (ăt′ə-nĭsĭ-tē, ăt′n-ĭs-) n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.