====== Definition: Hesperidium ======

A hesperidium (plural hesperidia) is a fleshy berry with a tough, leathery rind. [[citrus:Orange|Oranges]] and other [[:citrus]] fruits are common examples.

The peel contains volatile oil glands in pits. The fleshy interior is composed of separate sections, called carpels, filled with fluid-filled vesicles that are actually specialised hair cells.