occlusion

详细解释:n. 闭塞, 咬合, 包藏
【化】 包藏
【医】 Ж, 咬合, 闭塞, 闭合

英语解释：

名词 occlusion:

closure or blockage (as of a blood vessel)(meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft同义词：occluded front