What is "centrode"

Centrode \Cen"trode\ (s[e^]n"tr[=o]d), n. (Kinematics) In two figures having relative motion, one of the two curves which are the loci of the instantaneous center.

n. The path traced by the instantaneous rotational centre of a plane figure when it undergoes motion in a plane

Centrode in kinematics is the path traced by the instantaneous center of rotation of a rigid plane figure moving in a plane.