helicograph

[ hel-i-koh-graf, -grahf ]
/ ˈhɛl ɪ koʊˌgræf, -ˌgrɑf /

noun

an instrument for drawing helices.

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Origin of helicograph

First recorded in 1850–55; helico- + -graph
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for helicograph

helicograph
/ (ˈhɛlɪkəʊˌɡrɑːf, -ˌɡræf) /

noun

an instrument for drawing spiral curves
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