parallel rulers

noun

a pair of straightedges connected by two pivoted crosspieces of equal length so as to be parallel at all times, used for various navigational purposes, especially for transferring the bearing of a plotted course to a compass rose.

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Origin:
1695–1705

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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Parallel rulers is always a great word to know.

So is zedonk. Does it mean:

the offspring of a zebra and a donkey.

a scrap or morsel of food left at a meal.

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