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tree-form frame

American  
[tree-fawrm] / ˈtriˌfɔrm /

noun

  1. a rigid frame having a pair of inclined girders branching from each column, as to form principals of a roof.

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.