Dry vermouth is an aromatized, slightly fortified white wine with minimal or no sweetness. The word Vermouth comes from the German "wermuth", or wormwood. While there are many styles of dry vermouth, and no recipe is standard, dry vermouth is typically clear to pale yellow, herbal flavored, and very dry, with about 32-36 proof.
Dry vermouth (also known as French vermouth) was invented by Joseph Noilly in 1813, though many countries now make it.
Dry vermouth is typically more fragile than other styles. You should always buy the smallest bottle you can, and drink the vermouth within a week or two.