n. 集合, 聚合, 集合体

[化] 聚集; 聚集作用

[医] 集合, 聚集[作用]; 集合物

Aggregation \Ag`gre*ga"tion\, n. [Cf. LL. aggregatio, F.
agr['e]gation.]
The act of aggregating, or the state of being aggregated;
collection into a mass or sum; a collection of particulars;
an aggregate.

Each genus is made up by aggregation of species.
--Carpenter.

A nation is not an idea only of local extent and
individual momentary aggregation, but . . . of
continuity, which extends in time as well as in
numbers, and in space. --Burke.