quintillion

[ kwin-til-yuh n ]
/ kwɪnˈtɪl yən /

noun, plural quin·til·lions, (as after a numeral) quin·til·lion.

a cardinal number represented in the U.S. by 1 followed by 18 zeros, and in Great Britain by 1 followed by 30 zeros.

adjective

amounting to one quintillion in number.

Origin of quintillion

1665–75; < Latin quīnt(us) fifth + -illion (as in million)

OTHER WORDS FROM quintillion

quin·til·lionth, noun, adjective

British Dictionary definitions for quintillion

quintillion
/ (kwɪnˈtɪljən) /

noun plural -lions or -lion

(in Britain, France, and Germany) the number represented as one followed by 30 zeros (10 30) US and Canadian word: nonillion
(in the US and Canada) the number represented as one followed by 18 zeros (10 18) Former Brit word: trillion

Derived forms of quintillion

quintillionth, adjective

Word Origin for quintillion

C17: from Latin quintus fifth + -illion, as in million