How to sign: ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point
"he calculated the circumference of the circle";
Within this category: circlet, circle of curvature, epicycle, equator
How to sign: movement once around a course
"he drove an extra lap just for insurance";
Categories: locomotion, travel
Within this category: pace lap, victory lap