flocculate

动词 flocculate:

1. cause to become a fluffy or lumpy aggregate
2. form into an aggregated lumpy or fluffy mass

floc.cu.late

v.（动词）
floc.cu.lat.ed,floc.cu.lat.ing,floc.cu.lates
v.tr.（及物动词）
To cause (soil) to form lumps or masses.
凝聚：使（土壤）形成块或团
To cause (clouds) to form fluffy masses.
絮凝：使（云）形成棉絮状块
v.intr.（不及物动词）
To form lumpy or fluffy masses.
絮凝：形成团状或棉絮状块
n.（名词）
Something that has formed lumpy or fluffy masses.
絮凝物：形成团状或棉絮状块的东西

【引伸】
floc.cula.tion
n.（名词）