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Houghton Mifflin

at·o·ny  audio  (t-n, tn-) KEY 

NOUN:
  1. Lack of normal muscle tone.
  2. Lack of accent or stress.

ETYMOLOGY:
Late Latin atonia, from Greek atoni, from atonos, slack : a-, without ; see a-1 + tonos, stretching, tone ; see tone


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