septillion

• POS: Noun
• HYPHEN: sep=til=lion

CIDE DICTIONARY

septillion, n. [F. septilion, formed fr. L. septem seven, in imitation of million.].

 According to the French method of numeration (which is followed also in the United States), the number expressed by a unit with twenty-four ciphers annexed. According to the English method, the number expressed by a unit with forty-two ciphers annexed. See Numeration.  [1913 Webster]

OXFORD DICTIONARY

septillion, n. (pl. same) a thousand raised to the eighth (or formerly, esp. Brit., the fourteenth) power (10(24) and 10(42) respectively).

Etymology

F f. sept seven, after billion etc.