parfocal

[ pahr-foh-kuhl ]

adjectiveOptics.
  1. of or relating to different eyepieces (of telescopes or microscopes) that all focus their images in the same plane, so that they can be interchanged without readjusting the instrument.

Origin of parfocal

1
First recorded in 1885–90; par1 + focal

Words Nearby parfocal

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024