duodecimal(n = noun.quantity) one-twelfth, twelfth, twelfth part - one part in twelve equal parts;
is a kind of common fraction, simple fraction

   duodecimal(s = adj.all) - based on twelve; "the duodecimal number system"

duodecimal, adj. & n.
--adj. relating to or using a system of numerical notation that has 12 as a base.
--n.
1 the duodecimal system.
2 duodecimal notation.

Derivative:
duodecimally adv.

Etymology:
L duodecimus twelfth f. duodecim twelve

N  quinquesection, &c, division by five, quinquesection, decimation, fifth, quinquefid, quinquelateral, quinquepartite, quinqevalent, pentavalent, quinquarticular, octifid, decimal, tenth, tithe, duodecimal, twelfth, sexagesimal, sexagenary, hundredth, centesimal, millesimal.

duodecimal digit, duodecimal notation, duodecimal number system, duodecimal system