[ kwɪn'tɪljən ]
■ cardinal number ( plural ~s or (with numeral) same)
1》 a thousand raised to the power of six (10 18 ).
2》 dated, chiefly Brit. a million raised to the power of five (10 30 ).
Derivatives
~th ordinal number .
Origin
C17: from Fr., from million , by substitution of the prefix quinti- 'five' for the initial letters.