A term used in well-logging to refer to solid particles distributed within the interstices of the rock framework. A form of distribution of clays and other small particles and crystals. Detrital and/or authigenic materials often are found dispersed in the form of fines or crystal growths occupying pore space and lining the walls surrounding the pores.
Finely divided or colloidal in nature, such as pigment particles completely separated in a binder as compared with several pigments particles stuck to one another.
In reference to finishing materials, finely divided or colloidal in nature.