/kel"neuhr/ , Optics.
a Ramsden eyepiece having an achromatic lens, used in binoculars.
[ after Carl Kellner (1826-55), German opticist and lens maker ]
/kel"neuhr/ , Optics.
a Ramsden eyepiece having an achromatic lens, used in binoculars.
[ after Carl Kellner (1826-55), German opticist and lens maker ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012