Real Dictionary

colloid in American English
a solid, liquid, or gaseous substance made up of very small, insoluble particles (as single large molecules or masses of smaller molecules) that remain in suspension in a surrounding solid, liquid, or gaseous medium of different matter
adjective
noun: a substance made up of a system of particles with linear dimensions in the range of about 10−7 to 5 × 10−5 cm dispersed in a continuous gaseous, liquid, or solid medium whose properties depend on the large specific surface area. The particles can be large

colloid in British English
adjective: of or relating to the gluelike translucent material found in certain degenerating tissues
noun: a mixture having particles of one component, with diameters between 10–7 and 10–9 metres, suspended in a continuous phase of another component. The mixture has properties between those of a solution and a fine suspension

colloid in Chemical Engineering
noun: A colloid is a liquid or solid which is very finely dispersed in another liquid, solid, or gas.

colloid in the Pharmaceutical Industry
noun: A colloid is a mixture with particles of one component suspended in another component. The mixture is between a solution and a fine suspension.