from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Lack of normal muscle tone.
  • n. Lack of accent or stress.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Lack of muscle tone; flaccidity or atonia

from the GNU version of the Collaborative International Dictionary of English

  • n. Want of tone; weakness of the system, or of any organ, especially of such as are contractile.

from The Century Dictionary and Cyclopedia

  • n. In pathology, a want of tone; defect of muscular power; weakness of any organ, particularly of one that is contractile; debility.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. lack of normal muscular tension or tonus


Late Latin atonia, from Greek atoniā, from atonos, slack : a-, without; see a-1 + tonos, stretching, tone; see tone.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin atonia, from Ancient Greek ἀτονία (atonia, "languor"), from ἄτονος (atonos, "languid"), from ἀ- (a-, "privative") + τόνος (tonos, "accent"), from τείνειν (teinein, "to stretch"). (Wiktionary)



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