Falernum is either an 11% alcohol by volume syrup liqueur or a nonalcoholic syrup from the Caribbean. It is best known for its use in tropical drinks. It contains flavors of ginger, lime, and almond, and frequently cloves or allspice. It may be thought of as a spicier version of orgeat syrup.
Depending on sugar content, the consistency is often thick and is therefore sometimes referred to as "velvet falernum" because of the feeling it leaves on one's tongue. Brands vary and the color can be white to light amber, and it may be clear or translucent.