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.
Top definition. jawn. 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.
Geon may refer to: Geon (geology), a time interval; Geon (physics), a hypothetical gravitational wave packet; Geon (psychology), a geometrical primitive out of which everyday objects can be represented; Geon, short for geonim, rabbis in the medieval era; Geon, a character from the King of the Monsters series of video games