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Galilean telescope

noun
1.
a refracting telescope that forms an erect image, consisting of an objective of relatively long focal length that causes light rays to converge and an eyepiece of short focal length that causes them to diverge.
Origin
1715-1725
1715-25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Galilean telescope

Galilean telescope

/ˌɡælɪˈleɪən/
noun
1.
a type of telescope with a convex objective lens and a concave eyepiece; it produces an erect image and is suitable for terrestrial use
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
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