French curve
template made from metal, wood or plastic composed of many different curves; used in manual drafting to draw smooth curves of varying radii
en-GB/fɹɛnt͡ʃ ˈkɜːv/
en-US/ˈfɹɛnt͡ʃ ˈkɝv/
template made from metal, wood or plastic composed of many different curves; used in manual drafting to draw smooth curves of varying radii