| a. | 1. | Proceeding in computation by twelves; expressed in the scale of twelves. |
| n. | 1. | A twelfth part; |
| 2. | (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. |
| Adj. | 1. | duodecimal - based on twelve; "the duodecimal number system" |