conglomeration (n.)

1620s, "act of gathering into a ball or mass," from Late Latin conglomerationem (nominative conglomeratio), noun of action from past participle stem of Latin conglomerare "to roll together, concentrate, heap up," from assimilated form of com "with, together" (see con-) + glomerare "to gather into a ball, collect," from glomus (genitive glomeris) "a ball, ball-shaped mass," possibly from PIE *glem- (see glebe). Meaning "that which is conglomerated" is from 1650s.