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prismatic compass

American  

noun

  1. a hand compass equipped with sights and prisms to permit aiming the instrument at a point and at the same time reading the compass direction of the point.


Etymology

Origin of prismatic compass

First recorded in 1850–55


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Shoes in themselves are not enough to hang a man, but a prismatic compass assuredly is.

From The Story of the Guides by G. J. Younghusband

Setting a prismatic compass in position upon the sill of one of the glazeless windows, Ramblethorne took a careful bearing in a seaward direction.

From The Submarine Hunters A Story of the Naval Patrol Work in the Great War by Edward S. Hodgson

The local attraction was so great on this hill that the prismatic compass was useless; luckily I had my pocket sextant with me, by which I obtained the included angles.

From Explorations in Australia, Illustrated, by John Forrest

The dip was so great that our prismatic compass would not set closer than about 15 degrees, but the long compass needle of the dip-circle, though of course sluggish, continued to give excellent results.

From The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 by Sir Douglas Mawson

Meanwhile, Tatum had been reading a round of angles with the prismatic compass.

From The Ascent of Denali (Mount McKinley) A Narrative of the First Complete Ascent of the Highest Peak in North America by Hudson Stuck

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