- patella, kneecap, kneepan - a small flat triangular bone in front of the knee that protects the knee joint
--1 is a kind of sesamoid bone, os sesamoideum
--1 is a part of knee, knee joint, articulatio genus, genu - Patella, genus Patella - type genus of the family Patellidae: common European limpets
--2 is a kind of mollusk genus
--2 is a member of Patellidae, family Patellidae
--2 has members: common limpet, Patella vulgata