(Anat.) The kneecap; the kneepan; the cap of the knee.
3.
(Zool.) A genus of marine gastropods, including many species of limpets. The shell has the form of a flattened cone. The common European limpet (Patella vulgata) is largely used for food.
4.
(Bot.) A kind of apothecium in lichens, which is orbicular, flat, and sessile, and has a special rim not a part of the thallus.
... outer side of the leg. It is firmly fixed to the tibia at each end, and is commonly spoken of as the small bone of the leg. Its lower end forms the outer projection of the ankle. In front of the knee joint, embedded in a thick, strong tendon, is an irregularly disk-shaped bone, the patella, or knee-cap. It increases the leverage of important muscles, and protects the front of the knee joint, which is, from its position, ... — A Practical Physiology • Albert F. Blaisdell
... 2. a, Serratus magnus. b, Dimple over posterior superior b, Deltoid. spine of ilium. g, Biceps. g, Lower angle of scapula. d, Poupart's ligament. d, External head of triceps. e, Patella. e, Depression over the great T.P. Transpyloric plane. trochanter. S.C. Subcostal plane. z, Popliteal space. I.T. Intertubercular plane. e, Gastrocnemius. The scale between ... — Project Gutenberg Encyclopedia