a combining form with the meaning “muscle tension, nerve tension,” as specified by the initial element (hypertonia); used also in the formation of words that denote more generally a personality type or personality disorder (catatonia; somatotonia).

Nearby words

  1. -to-be,
  2. -tome,
  3. -tomous,
  4. -tomy,
  5. -ton,
  6. -tonic,
  7. -tor,
  8. -tory,
  9. -trice,
  10. -trich

Origin of -tonia

see origin at tone, -ia

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for -tonia



Degree or state of tonicity:myotonia.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.