Definition of "field glass" []

• A portable binocular telescope without prisms used especially outdoors for viewing distant objects. Often used in the plural: used a pair of field glasses to watch the marsh birds. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Hitching 'Traveller' en perdu, for fear of his getting hurt, with field glass in hand, he climbed the parapet and began his observations and mental notes, whilst the supplication arose all up and down the line: 'Come down, General Lee, for God"