galilean-telescope
Galilean telescope
noun
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:
1715–25
1715–25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
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Link To galilean-telescope
Collins
World English Dictionary
Galilean telescope (ˌɡælɪˈleɪən) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| 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 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
00:10
Galilean-telescope
is always a great word to know.
So is callithumpian. Does it mean:
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
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