Similar term(s): Surface active agent, Wetting agent.
A surfactant is a substance that reduces the surface tension of a liquid in
which it is dissolved.
When dissolved in water a surfactant gives a product the ability to remove
dirt from surfaces such as the human skin, textiles, and other solids.
Biocide(s) - Surface tension
To read about this term in context:
GreenFacts Summary on Effects of Biocides on antibiotic resistance: