cluster (n.)youdaoicibaDictYouDict[cluster 词源字典]
Old English clyster "cluster," probably from the same root as clot (n.). Of stars, from 1727. Cluster-bomb attested from 1967.[cluster etymology, cluster origin, 英语词源]
cluster (v.)youdaoicibaDictYouDict
late 14c. (transitive), from cluster (n.). Intransitive sense from 1540s. Related: Clustered; clustering.