The '''lemon''' is both a small [[evergreen]] tree (''Citrus [[hybrid name|×]] limon'', often given as ''C. limon'') native to Asia, and the tree's oval yellow fruit. The fruit is used for culinary and nonculinary purposes throughout the world – primarily for its [[juice]], though the pulp and [[peel (fruit)|rind]] ([[zest (ingredient)|zest]]) are also used, mainly in [[cooking]] and [[baking]]. [[Lemon juice]] is about 5% to 6% (approximately 0.3 [[molarity|M]]) [[citric acid]], which gives lemons a sour taste, and a [[pH]] of 2 to 3. This makes lemon juice an inexpensive, readily available [[acid]] for use in educational science experiments. Many lemon-flavored drinks and candies are available, including [[lemonade]] and [[sherbet lemon]]s. The distinctive sour taste of lemon juice makes it a key ingredient in many dishes across the world.
