quantum

n. (pl. quanta)१ (as, the basic unit of discrete values of certain quantities, such as orbital angular momentum, energy in electromagnetic radiation; as, one of the very small increments or parcels into which many forms of energy are subdivided) क्वांटम (न.) (अ. व. क्वांटा) २ (commonly) प्रमात्रा (स्त्री.)