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object glass

noun Optics.
  1. objective(def 3).
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Origin of object glass

First recorded in 1655–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for object glass

Historical Examples of object glass

  • The distance between the object-glass and the eye-piece of a telescope.

    The Sailor's Word-Book

    William Henry Smyth

  • It is usually estimated by the clear diameter of the object-glass.

    The Sailor's Word-Book

    William Henry Smyth

  • "This is the object-glass of our telescope," was the answer.

  • The front end of the telescope is open, there being no object-glass.

    How it Works

    Archibald Williams

  • In the case of the object-glass of a telescope the image was at what we may call the short focus.

    How it Works

    Archibald Williams


British Dictionary definitions for object glass

object glass

noun
  1. optics another name for objective (def. 11)
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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