commutator
n. மின்னோட்ட அலைகளைத் திருப்பிவிடும் கருவி, இனமாற்றம் செய்பவர்.
Com"mu*ta`tor, n. (Elec.) Defn: A piece of apparatus used for reversing the direction of an electrical current; an attachment to certain electrical machines, by means of which alternating currents are made to be continuous or to have the same direction.