cusps的意思？

cusps的音标：cusps的英式发音音标为：['kʌsps]cusps的美式发音音标为：['kʌsps]...

The aortic valve shows three thin and delicate cusps.主动脉瓣由三个薄而精细的瓣叶组成.Note there are three cusps sewn into a synthetic ring.可见三个瓣叶围绕形成环.Nodules of calcification are seen on the cusps here.可见瓣膜尖端有钙化结节....