第三人称复数：patellas; patellae
名词膝盖骨
1. patella
1. Scans Tuesday confirmed he had knocked a small piece of cartilage off the joint surface of the patella in his left knee.
noun
1. patella的意思
1. a small flat triangular bone in front of the knee that protects the knee joint
Synonym: kneecap kneepan