nucleation

in colloid chemistry
also defines: simultaneous nucleation, homogeneous nucleation, heterogeneous nucleation
https://doi.org/10.1351/goldbook.N04243
The process by which nuclei are formed in solution. The condensation of a single chemical compound is called 'homogeneous nucleation'. The simultaneous condensation of more than one compound is called 'simultaneous nucleation'. The condensation of a compound on a foreign substance is called 'heterogeneous nucleation'.
Source:
Orange Book, 2nd ed., p. 84 [Terms] [Book]
See also:
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 608 [Terms] [Paper]