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zigzag rule

American  

noun

  1. a rule composed of light strips of wood joined by rivets so as to be foldable, all the opening and closing parts being in parallel planes.

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.