1. massing or clumping of materials together. 2. a clumped mass of material. familial aggregation the occurrence of more cases of a given disorder in close relatives of a person with the disorder than in control families. platelet aggregation platelet agglutination.
boule â(plural boules). 1  One of the bowls used in the French game of boules. 2  A single-crystal ingot produced by synthetic means. 3  A round loaf of bread. 4  A round piece of dough. ( 5 woodworking) A through-sawn log with the slices restacked in the order and orientation they originally had in the log, usually with waney edges.
Boron is a nonmetallic element with the atomic number 5, identified by the symbol B on the periodic table. There are a number of uses for it, and like many elements, it appears in various forms which have different potential applications. Pure elemental boron, however, is not found in nature, and it must be chemically extracted.