SG Heritage Dictionary

Duodecimal [Adjective] Webster's Dictionary 1913

Proceeding in computation by twelves; expressed in the scale of twelves.

Duodecimal [Noun] Webster's Dictionary 1913

1. A twelfth part; as, the duodecimals of an inch.

2. 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.