object-glass

object glass

noun Optics.
objective ( def 3 ).

Origin:
1655–65

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World English Dictionary
object glass
 
n
optics another name for objective

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Object-glass is always a great word to know.
So is zedonk. Does it mean:
the offspring of a zebra and a donkey.
a fool or simpleton; ninny.
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