The adjective locular describes organisms or structures containing cavities or chambers. Some mollusks have locular shells, and plants like peppers are locular, having seeds in compartments.
When you slice most cucumbers, you'll find a three-chambered structure inside, with edible seeds nestled into each narrow space. Other locular fruits include tomatoes and lemons. Many flowers and some fungi are also locular. Each compartment or chamber is a locule, the plural of which is loculi. The word derives from the Latin diminutive loculus, "little place," from locus, "place."