duodecimal adj 1: based on twelve; "the duodecimal number system" n 1: one part in twelve equal parts [syn: {one-twelfth}, {twelfth}, {twelfth part}, {duodecimal}]
Duodecimal \Du`o*dec"i*mal\, a. [L. duodecim twelve. See {Dozen}.] Proceeding in computation by twelves; expressed in the scale of twelves. -- {Du`o*dec"i*mal*ly}, adv. [1913 Webster]
Duodecimal \Du`o*dec"i*mal\, n. 1. A twelfth part; as, the duodecimals of an inch. [1913 Webster] 2. pl. (Arch.) A system of numbers, whose denominations rise in a scale of twelves, as of feet and inches. The system is used chiefly by artificers in computing the superficial and solid contents of their work. [1913 Webster]