noun
Barlow
bah-loh
noun
1
A type of compound lens placed in front of a telescope's eyepiece to increase magnification.
"Adding a Barlow lens doubled the telescope's effective magnification."
How to Use Barlow
Learner’s notesIn plain EnglishA lens accessory that boosts a telescope's zoom power.
Word Forms
Barlows plural
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Adding a _____ lens doubled the telescope's effective magnification.
Etymology
Named after the English optician who invented the lens design; the word also survives as a common English surname.