(in three-color photography) a device for determining the exposure factors of the filters to be used.

Nearby words

  1. ratio,
  2. ratio scale,
  3. ratio test,
  4. ratiocinate,
  5. ratiocination,
  6. ration,
  7. rational,
  8. rational form,
  9. rational function,
  10. rational horizon

Origin of ratiometer

1920–25, for an earlier sense; ratio + -meter

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