1570s, from Latin conglomeratus, past participle of conglomerare "to roll together, concentrate, heap up," from com "with, together" (see com-) + glomerare "to gather into a ball, collect," from glomus (genitive glomeris) "a ball, ball-shaped mass," possibly from PIE *glem- (see glebe).
"large business group," 1967, from conglomerate (adj.).
1590s, from Latin conglomeratus, past participle of conglomerare (see conglomerate (adj.)). Related: Conglomerated; conglomerating.
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