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principal focus
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This shows grade level based on the word's complexity.
noun Optics.
QUIZ
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Origin of principal focus
First recorded in 1825–35
Words nearby principal focus
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use principal focus in a sentence
British Dictionary definitions for principal focus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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