Bĭl'lion, n.

(bĭl'yun), n. [Fr. billion, a word arbitrarily formed from Lat. bis, twice, and L. Lat. millis, Fr. million, a million. Cf. TRILLION, QUADRILLION.] According to the French method of numeration, a thousand millions, or 1,000,000,000; according to the English method, a million of millions, or 1,000,000,000,000. See NUMERATION.