surfactant (surface active agent)

https://doi.org/10.1351/goldbook.S06194
A substance which lowers the @[email protected] of the medium in which it is dissolved, and/or the @[email protected] with other phases, and, accordingly, is positively adsorbed at the liquid/vapour and/or at other interfaces.
Source:
PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 611 [Terms] [Paper]