The roughly triangular sesamoid bone located in front of the knee, within the tendon of the quadriceps femoris muscle, a major extensor of the lower leg. image

Knee cap, a small triangular sesamoid bone located in front of the knee.

the leg segment between the femur and tibia (you may think of it as a spider's "knee").

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.

type genus of the family Patellidae: common European limpets

A kind of apothecium in lichens, which is orbicular, flat, and sessile, and has a special rim not a part of the thallus.

A small dish, pan, or vase.

Latin a small pan; adjective - patellar.