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arcograph

[ahr-kuh-graf, -grahf] /ˈɑr kəˌgræf, -ˌgrɑf/
noun, Geometry
1.
an instrument for drawing arcs, having a flexible arc-shaped part adjusted by an extensible straight bar connecting its sides.
Origin
1815-1825
1815-25; arc + -o- + -graph
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for arcograph

arcograph

/ˈɑːkəˌɡrɑːf; -ˌɡræf/
noun
1.
(geometry) an instrument used for drawing arcs without using a central point Also called cyclograph
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
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