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principal focus

American  

noun

Optics.
  1. focal point.


principal focus British  

noun

  1. another name for focal point

"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

Etymology

Origin of principal focus

First recorded in 1825–35

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:

Przemysl emerged as a principal focus of the ongoing exodus because it is the first major city to the west of Medyka, the busiest crossing point along the 300-mile Polish-Ukrainian border.

From Los Angeles Times Mar. 2, 2022

It was the same year in which McConnell identified his party’s principal focus.

From MSNBC Mar. 5, 2019

His principal focus is, in short, to keep the country safe.

From Slate Dec. 12, 2017

That’s the principal focus of the FBI and the Senate Intelligence Committee, which is moving forward with its work despite all the controversy involving the House committee and the White House.

From Washington Post Mar. 31, 2017

The relationship which exists between pairs of points in this manner is termed the conjugate foci of a lens, and though every lens has only one principal focus, yet its conjugate foci are innumerable.

From Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 by Martin, Marcus J.

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