micelle

https://doi.org/10.1351/goldbook.M03889
@S06194@ in solution are often @A00472@ colloids, that is, they tend to form aggregates of @C01172@ dimensions, which exist in equilibrium with the molecules or ions from which they are formed. Such aggregates are termed micelles.
See also:
inverted micelle
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1140 [Terms] [Paper]