septillion

[ sep-til-yuhn ]

noun

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

1. a cardinal number represented in the U.S. by 1 followed by 24 zeros, and in Great Britain by 1 followed by 42 zeros.

adjective

1. amounting to one septillion in number.

septillion

/ sɛpˈtɪljən /

noun

1. (in Britain, France, and Germany) the number represented as one followed by 42 zeros (10 ⁴²)
2. (in the US and Canada) the number represented as one followed by 24 zeros (10 ²⁴) Brit wordquadrillion

Derived Forms

• sepˈtillionth, adjectivenoun

Other Words From

• sep·tillionth noun adjective

Word History and Origins

Origin of septillion¹

1680–90; < French, equivalent to sept seven + -illion, as in million

Word History and Origins

Origin of septillion¹

C17: from French, from sept seven + -illion, on the model of million