Fern-leaf refers to a particular shape and texture of a leaf, commonly found in ferns. It is characterized by a narrow, elongated shape with a jagged edge, resembling the fronds of a fern. There are several other words used to describe fern-leaf, including pinnate, compound, and bipinnate. Pinnate is used to describe leaves with an elongated shape and a series of smaller leaflets arranged along the central axis. Compound refers to leaves composed of several individual leaflets, often arranged in a pattern similar to a fern-leaf. Bipinnate refers to leaves that are pinnate, but with smaller leaflets arranged along the edges of the larger leaflets, creating a branched appearance.