ruling pen

noun

Definition of ruling pen

: a draftsman's pen for ruling lines that has a pair of adjustable metal blades or points between which the ink is contained with the thickness of the line being regulated by a screw that closes the blades or allows them to open

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Cite this Entry

“Ruling pen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ruling%20pen. Accessed 2 Oct. 2022.

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