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Kellner eyepiece

[ kel-ner ]
/ ˈkɛl nər /
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noun Optics.

a Ramsden eyepiece having an achromatic lens, used in binoculars.

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QUIZ YOURSELF ON “THEIR,” “THERE,” AND “THEY’RE”

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Which one of these commonly confused words can act as an adverb or a pronoun?

Origin of Kellner eyepiece

After Carl Kellner (1826–55), German opticist and lens maker

Words nearby Kellner eyepiece

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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