trestletree

[ tres-uh l-tree ]
/ ˈtrɛs əlˌtri /

noun Nautical.

either of a pair of timbers or metal shapes lying along the tops of the hounds or cheeks of a mast to support crosstrees or a top.

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"EVERYDAY" VS. "EVERY DAY" QUIZ: IS IT ONE WORD OR TWO?

An everyday activity is one you do every day. (Thanks, English.) Practice using "everyday," one word, and "every day," two words, in this fun quiz with … everyday example sentences!
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Origin of trestletree

First recorded in 1615–25; trestle + tree
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for trestletree

trestletree
/ (ˈtrɛsəlˌtriː) /

noun

nautical either of a pair of fore-and-aft timbers fixed horizontally on opposite sides of a lower masthead to support an upper mast
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