Crushed stone, slag or water-worn gravel that comes in a wide range of sizes and is used to surface built-up roofs.
Merriam-Webster Online Dictionary
aggregate (adjective) formed by the collection of units or particles into a body, mass, or amount as - collective
a) (1) clustered in a dense mass or - head an aggregate flower
(2) formed from several separate of a single flower - ovaries aggregate fruit
b) composed of mineral crystals of one or more kinds or of mineral rock fragments
c) taking all units as a whole - aggregate sales
transitive verb
1.
to collect or gather into a mass or whole
2.
to amount to (a whole sum or total) - total
1.
a mass or body of units or parts somewhat loosely associated with one another
2.
the whole sum or amount - sum total
3.
a) a rock composed of mineral crystals of one or more kinds or of mineral rock fragments an aggregate rock
b) any of several hard materials (as sand, gravel, or slag) used for mixing with a cementing material to form concrete, mortar, or plaster - inert
c) a clustered mass of individual soil particles varied in shape, ranging in size from a microscopic granule to a small , and considered the basic structural unit of soil - crumb
4.
- set
5.
- monetary aggregate
aggregate (Wikipedia)
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Aggregate may refer to: