1. adj. [Drilling Fluids]

A descriptive term for the strong affinity that a solid material (usually a colloid) has for the liquid in which the solid is dispersed. For example, clay is a lyophilic colloid in water.

See related terms: hydrophilic,  lipophilic,  lyophilic colloid,  organophilic,  organophilic lignite,  surfactant