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angle of depression

American  

noun

Surveying.

  1. the angle between the line from an observer or instrument to an object below either of them and a horizontal line.

Etymology

Origin of angle of depression

First recorded in 1780–90

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.