Medical Definition of cluster
: a larger than expected number of cases of disease (as leukemia) occurring in a particular locality, group of people, or period of time
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Dictionary: Definition of "cluster" Thesaurus: All synonyms and antonyms for "cluster" Spanish Central: Translation of "cluster" Nglish: Translation of "cluster" for Spanish speakers Britannica English: Translation of "cluster" for Arabic speakers Britannica.com: Encyclopedia article about "cluster"
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