What are leaves made up of several leaflets together in a single leaf called?

Leaves composed of several leaflets attached to a single stem are termed compound leaves. In these leaves, multiple leaflets together comprise one leaf unit, which distinguishes them from simple leaves, which consist of a single undivided blade. This structure allows for greater surface area for photosynthesis while maintaining flexibility, making compound leaves particularly advantageous in windy or harsh environments.

Deciduous leaves refer to those that fall off the tree in the autumn and are not defined by the number of leaflets. Perennial leaves relate to plants that live for several years, again not connected to the composition of leaflets. Thus, the terminology clearly supports the classification of compound leaves as those that contain multiple leaflets.