comparison microscope

comparison microscope

noun Optics.
a microscope having two objective lenses and using a system of prisms to form in one eyepiece adjacent images of two different objects.

Origin:
1935–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Comparison microscope is always a great word to know.
So is ort. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a scrap or morsel of food left at a meal.
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