mar·ga·ri·ta 
(mär′gə-rētə)
(mär′gə-rētə)n.
A cocktail made with tequila, an orange-flavored liqueur, and lemon or lime juice, often served with salt encrusted on the rim of the glass.
[Perhaps from Spanish margarita, daisy (on the model of English magnolia, a kind of cocktail popular before the margarita), or from the Spanish name Margarita, Margaret, both from Latin margarīta, pearl, from Greek margarītēs; see MARGARITE.]