https://doi.org/10.1351/goldbook.F02467
A dispersion in which a large proportion of gas by volume in the form of gas bubbles, is dispersed in a liquid, solid or @[email protected] The diameter of the bubbles is usually larger than \(1\ \unicode[Times]{x3BC}\text{m}\), but the thickness of the lamellae between the bubbles is often in the usual @[email protected] size range. The term froth has been used interchangeably with foam. In particular cases froth may be distinguished from foam by the fact that the former is stabilized by solid particles (as in @[email protected] q.v.) and the latter by soluble substances.
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 606 [Terms] [Paper]