资料来源 : Webster's Revised Unabridged Dictionary (1913)

Flocculation \Floc`cu*la"tion\, n. (Geol.)
   The process by which small particles of fine soils and
   sediments aggregate into larger lumps.

资料来源 : WordNet®

flocculation
     n : the process of flocculating; forming woolly cloudlike
         aggregations