sextillion
Concise Oxford English Dictionary © 2008 Oxford University Press:
sextillion /sɛksˈtɪljən/
▶cardinal number (pl. sextillions or (with numeral) same) a thousand raised to the seventh power (1021).
■ dated, chiefly Brit. a million raised to the sixth power (1036).
– derivatives
sextillionth ordinal number.
sextillionth ordinal number.
– origin C17: from Fr., from million, by substitution of the prefix sexti- ‘six’ (from L. sextus ‘sixth’) for the initial letters.
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