wetting agent

== English == === Noun === wetting agent (plural wetting agents) A substance, such as a surfactant, that reduces the surface tension of a liquid, allowing it to spread across and penetrate the surface of a solid. ==== See also ==== ==== Further reading ==== “wetting agent”, in Merriam-Webster.com Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present. “wetting agent” in Longman Dictionary of Contemporary English, Longman. “wetting agent”, in Collins English Dictionary, 2011–present.