sinus
noun uk/ˈsaɪ.nəs/ us/ˈsaɪ.nəs/
(SPACE IN BODY)
[ C ]窦，鼻窦
any of the spaces inside the head that are connected to the back of the nose
[ C ] medical specialized窦道（脓液流出的管道）
a space or passage filled with pus (= a thick yellow liquid) that flows to the surface of the skin
(HEART)
[ U ] medical specialized（控制心率的）窦房节
the sinoatrial node (= tissue in the heart responsible for the heart's rhythm)
The electrocardiogram will confirm sinus bradycardia. 心电图将证实窦性心动过缓。