the.com/clusters
nature's favorite filing system: group first, sort out the labels later.
means a cluster is a set of things that hang together in space, time, or similarity, tighter to each other than to anything outside the group.
from from old english clyster, related to clot — the same root as clotting blood, which is fitting since a cluster is basically stuff refusing to stay separate.
astronomy usegalaxies clump into clusters bound by gravity alone
stats usecluster analysis finds groups without being told the labels
disease scaresrandom clusters look meaningful even when they are pure chance