noun
or drop compass
: a bow compass that permits the center leg to remain stationary while the pen or pencil rotates around the center shaft and that is used especially for drawing small circles
noun
or drop compass
: a bow compass that permits the center leg to remain stationary while the pen or pencil rotates around the center shaft and that is used especially for drawing small circles
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012