7. (Dyeing)
Defn: A substance used as a mordant. Ure.
8. (Fort.)
Defn: The exterior side of the polygon, or that imaginary line which connects the salient angles of two adjacent bastions.
9. (Geom.)
Defn: The line or surface constituting that part of a figure on which it is supposed to stand.
10. (Math.)
Defn: The number from which a mathematical table is constructed; as, the base of a system of logarithms.
11. Etym: [See Base low.]
Defn: A low, or deep, sound. (Mus.) (a) The lowest part; the deepest
male voice. (b) One who sings, or the instrument which plays, base.
[Now commonly written bass.]
The trebles squeak for fear, the bases roar. Dryden.