focometer

[ foh-kom-i-ter ]
/ foʊˈkɒm ɪ tər /

noun Optics.

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

Origin of focometer

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

Words nearby focometer

focal seizure, focal-plane shutter, focalize, foch, foci, focometer, focsani, focus, focus group, focus puller, focused strategy

British Dictionary definitions for focometer

focometer
/ (fəʊˈkɒmɪtə) /

noun

an instrument for measuring the focal length of a lens