Used to label an unusually large number of occurrances of a disease or condition in one place. An autism cluster would be an unusually large number of cases of autism in (perhaps) a single locality. Clusters constitute evidence in the search for causes of diseases and conditions.
jawn. 1  a word used by Philly cats to describe anything and everything. NY cats interject with the word joint but it doesn't convey the same feelings. 2  a word used by people in philly, it can mean anything, like a fine girl, a blunt, really, it can be used for everything. it basically means thing.
Jawa. The Jawas are a scavenger species. They comb the deserts of Tatooine in search of discarded scrap and wayward mechanicals. Using their cobbled-together weaponry, they can incapacitate droids and drag them to their treaded fortress-homes, immense sand-scarred vehicles known as sandcrawlers.