occlusion
noun
[ əˈkluːʒ(ə)n ]
• the blockage or closing of a blood vessel or hollow organ.
• a process by which the cold front of a rotating low-pressure system catches up the warm front, so that the warm air between them is forced upwards off the earth's surface between wedges of cold air.
• the position of the teeth when the jaws are closed.
Origin:
mid 17th century: from Latin occlus- ‘shut up’ (from the verb occludere ) + -ion.
