1ag;glom;er;ate pronunciation: function: transitive verb inflected form(s): ag;glom;er;at;ed; ag;glom;er;at;ingetymology: latin agglomeratus, past participle of agglomerare to heap up, join, from ad- + glomer-, glomus ball — more at clamdate: 1684 : to gather into a ball, mass, or cluster