A cocktail typically made of:
Stir well with ice. Strain into pre-chilled cocktail glass. Sugar-frost rim of glass.
A 1928 description of the drink was: "gin, a spot of lime, and soda" (D. B. Wesson, I'll never be Cured III). A 1953 description was: "a real gimlet is half gin and half Rose's Lime Juice and nothing else" (R. Chandler, Long Good-Bye).
For the Vodka gimlet, replace gin with vodka. As of the 1990s, maybe earlier, bartenders often answer requests for the gimlet with a vodka gimlet. They may also serve the gimlet on the rocks.