Even-pinnate leaf refers to a type of compound leaf where the leaflets are paired on either side of the central axis. The leaflets of an even-pinnate leaf are usually symmetrical and aligned in an even pattern. Synonyms for this type of leaf include bipinnate, twice-pinnate, and feathery-pinnate. Bipinnate leaf refers to a leaf with two levels of leaflets, while twice-pinnate leaf refers to a leaf with two sets of leaflets arranged in a feather-like pattern. Feathery-pinnate is a descriptive term used for leaves that are finely divided, giving the appearance of feathers. All these synonyms are useful for distinguishing different types of even-pinnate leaves.