focometer

[foh-kom-i-ter]

noun Optics.

an instrument for measuring the focal length of a lens or other optical system.

Nearby words

  1. focalize,
  2. focally,
  3. foch,
  4. foch, ferdinand,
  5. foci,
  6. focsani,
  7. focus,
  8. focus group,
  9. focus puller,
  10. focused

Origin of focometer

First recorded in 1850–55; foc(us) + -o- + -meter

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


British Dictionary definitions for focometer

focometer

noun

an instrument for measuring the focal length of a lens
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012