(ˈ)bīˌ adjective
Etymology: bi- (I) + quinary
: of, based on, being, or relating to a mixed-base system of numbers in which each decimal digit n is represented as a pair of digits xy where n = 5 x + y and x is written in base 2 as 0 or 1 and y is written in base 5 as 0, 1, 2, 3, or 4
decimal 9 is represented by biquinary 14