A shrub is a small-to-medium-sized perennial woody plant with several perennial stems that may be erect or may lie close to the ground. Shrubs can be either deciduous or evergreen, and they usually have a height less than 10 feet and stems no more than about three inches in diameter. The term "shrub" is often used interchangeably with "bush," but a bush refers to the growth habit of various plants, while a shrub refers to a specific type of plant. In horticulture, a shrub can specifically mean a plant that maintains its structure above the ground all year round. It is important to note that the term "shrub" can also refer to a cocktail or soft drink that was popular during Americas colonial era, made by mixing a vinegared syrup with spirits, water, or carbonated water).