What does colloid mean in science terms?

Answer 1

it is a substance made up of a system ofparticles 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 largespecific surface area. The particles can be large moleculeslike proteins, or solid, liquid, or gaseous aggregates and theyremain dispersed indefinitely.