Lime juice is the juice of any one of a number of cultivars of the lime, a greenish fruit with a sour pulp and acidic juice. There are many different types of lime, with the most common being:

Citrus latifolia, also known as the Persian lime, the Tahiti lime, and the Bearss lime (after John Bearss, who developed it in 1895). These are the most common supermarket limes, and are seedless.

Citrus aurantifolia, also known as the Key lime or Bartender's lime. These are smaller and more yellow than the Persian lime, with many seeds and are not only highly acidic, but also interestingly bitter at the same time. 

Citrus hystrix, also known as the Kaffir lime, or Makrut lime. These are about as small as the Key Lime, but have a warty skin and are intensely sour. The kaffir lime (both zest and especially leaves) are commonly used in Malaysian and Thai cooking, but the juice is more commonly used as a cleanser. 

All lime juice is sour, having a pH of between 1.8 and 2, which makes it more sour than [ingredient=lemon-juice lemon juice]. For cocktail usage, the lime's strong green, grassy aspect works well with herbal flavors (think [ingredient=gin gin] and Green [ingredient=chartreuse Chartreuse]). It is not as neutral of an acidifier as lemon juice. 

Some popular cocktails containing Lime juice

  • Earth Mother — Amargo-Vallet, Crème de Banane, Lime juice, Vanilla syrup
  • Boo Loo — Gold rum, Demerara Rum, Jamaican rum, Pineapple juice, Lime juice, Club soda, Honey syrup, Pineapple
  • Bogged Down Mule — Bison grass vodka, Cranberry liqueur, Bitters, Ginger beer, Lime juice, Simple syrup
  • Pliny's Tonic — Gin, Lime juice, Simple syrup, Cucumber, chili tincture, Mint
  • Smoke and Fire Sour — Mezcal, Kummel, Pepper tincture, Lime juice, Lemon peel
  • Cosmopolitan Milk Punch — Vodka, Tawny port, Triple sec, Tonic water, Cranberry juice, Milk, Lime juice, Sugar, Star anise, Bay leaf, Clove, Pomegranate molasses, Orange peel, Grapefruit peel, Cardamom
  • It's Green, So it Must be Good For You — Blanco tequila, Jasmine Liqueur, Bitters, Cucumber juice, Lime juice, Simple syrup, Sparkling water, Fleur de sel, Dill
  • Satsuma Margarita — Tequila, Triple sec, Satsuma juice, Lime juice, Agave syrup
  • Paloma Sangria — White wine, Blanco tequila, Grapefruit juice, Lime juice, Simple syrup, Salt
  • Pixie Fingers — Gin, Tonic water, Lemon juice, Lime juice, Agave syrup, Rosemary, Lemon
Explore more Lime juice cocktails.