- (anthropology) the tendency of populations to cluster in settlements of increasing size and density. Source: Anthromorphemics
- (chemistry) A process in which water condenses on a small atmospheric particle. Nucleation aides in the process of condensation (see methanesulfonic acid). [Journal of Atmospheric Sciences; v51; 1843-1856; 1994.] [Nature; v365; 823-826; 1993.] Source: Atmospheric Chemistry Glossary
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