Duodecimal

a.	1.	Proceeding in computation by twelves; expressed in the scale of twelves.
n.	1.	A twelfth part; as, the duodecimals of an inch.
	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"

quantitative