diffusion-limited aggregation
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diffusion-limited aggregation
[də′fyü·zhən ¦lim·əd·əd ag·rə′gā·shən] (physics)
A mathematical model for particle aggregation processes, such as the growth of a metal deposit on an electrochemical cell, in which particles move according to a random walk process until they arrive at a certain fixed distance from the current aggregate, where they stick to it.