The term "plano-convex" is often used to describe a specific type of lens shape, but there are a variety of synonyms that can be used to describe the same thing. Some common alternatives include "meniscus," "biconvex," and "double-convex." Each of these terms refers to a lens with a curved, convex surface on one side and a flat surface on the other. Other similar terms may include "positive lens," "center thicker lens," or "converging lens." These synonyms are all helpful for describing the unique properties and uses of plano-convex lenses, which are commonly used for magnification, imaging, and other optical applications.