කල්පය, n. a period said to be equal to a day of Brahma which equals 4,320,000,000 solar years: it is the Sakwala or world period, which is divided into four parts, viz. its formation, its duration, its destruction and its non-entity until the commencement of its reformation. It is difficult, however, to reconcile the various statements one with another, since during the Kalpa the age of man is said to gradually increase from ten years to an asankhya and again to diminish gradually to ten years: an asankhya being about the twentieth power of a million.