Definitions

1. noun

A type of leaf, especially a leaf that is shaped like a three-lobed or three-toothed leaf, or a leaf of a plant such as the common sassafras.

“The doctor studied the unique folium of the rare plant species.”

2. noun

In geometry, a folium is a type of algebraic curve.

“The mathematician was working on a complex folium equation.”

3. noun

In botany, the folium may also refer to the leaf of a plant, especially when it is flat and narrow.

“The narrow folium of the aspen tree is one of its distinctive features.”