(n) :
(US; modern British & Australian, short scale) A billionbillion: 1 followed by eighteen zeros, 1018; (dated British & Australian, long scale) A millionquadrillion: 1 followed by 30 zeros, 1030
(n) :
(US; modern British & Australian, short scale) A billionbillion: 1 followed by eighteen zeros, 1018; (dated British & Australian, long scale) A millionquadrillion: 1 followed by 30 zeros, 1030