helicograph

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

noun

an instrument for drawing helices.

Origin of helicograph

First recorded in 1850–55; helico- + -graph

British Dictionary definitions for helicograph

helicograph
/ (ˈhɛlɪkəʊˌɡrɑːf, -ˌɡræf) /

noun

an instrument for drawing spiral curves