occlusion was our Word of the Day on 04/24/2013. Hear the podcast!
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What Do the Words occlusion, recluse, seclusion, and exclude Have in Common?
Occlusion is a descendant of the Latin verb occludere, meaning "to close up." "Occludere" in turn comes from the prefix ob-, here meaning "in the way," and the verb claudere, meaning "to close or shut." "Occlusion" is one of many English terms derived from "claudere." Some others are "recluse," "seclusion," and "exclude." An occlusion occurs when something has been closed up or blocked off. Almost all heart attacks are the result of the occlusion of a coronary (heart) artery by a blood clot. When a person's upper and lower teeth form a "malocclusion," they close incorrectly or badly. An occlusion, or occluded front, happens when a fast-moving cold front overtakes a slow-moving warm front and slides underneath it, lifting the warm air and blocking its movement.
Origin and Etymology of occlusion
First Known Use: circa 1645See Words from the same year
medical Definition of occlusion
- occlusion of the eyelids
Seen and Heard
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