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American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(General Physics) optics another name for objective11
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||object glass - the lens or system of lenses in a telescope or microscope that is nearest the object being viewed|
compound microscope - light microscope that has two converging lens systems: the objective and the eyepiece
lens, lens system, lense - a transparent optical device used to converge or diverge transmitted light and to form images
optical telescope - an astronomical telescope designed to collect and record light from cosmic sources
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