คำว่า ' quadrillion ' ( N )
มีความหมายในภาษาไทยว่า เลข 1 ซึ่งเติม 0 อีก 15 ตัว
คำนิยามในภาษาอังกฤษ (definition) :
[n.] According to the French notation, which is followed also upon the Continent and in the United States, a unit with fifteen ciphers annexed; according to the English notation, the number produced by involving a million to the fourth power, or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration.