colloid

adj. sticky, resembling glue

n. sticky substance composed of particles that do not dissolve in other substances

A Colloid or colloidal dispersion is a type of heterogeneous mixture. A colloid consists of two separate phases: a dispersed and balls phase and a continuous phase. In a colloid, the dispersed phase is made of tiny particles or droplets that are distributed evenly throughout the continuous phase. The size of the dispersed phase particles are between 1 nm and 1000 nm in at least one dimension. Homogeneous mixtures with a dispersed phase in this size range may be called colloidal aerosols, colloidal emulsions, colloidal foams, colloidal dispersions or hydrosols. The dispersed phase particles or droplets are largely affected by the surface chemistry present in the colloid.
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Noun
1. a mixture with properties between those of a solution and fine suspension
(hypernym) mixture
(hyponym) silver protein
(class) dispersed phase, dispersed particles

(n.)
A substance (as albumin, gum, gelatin, etc.) which is of a gelatinous rather than a crystalline nature, and which diffuses itself through animal membranes or vegetable parchment more slowly than crystalloids do; -- opposed to crystalloid.
  

(n.)
A gelatinous substance found in colloid degeneration and colloid cancer.
  

(a.)
Resembling glue or jelly; characterized by a jellylike appearance; gelatinous; as, colloid tumors.
  

 Say it 
A colloid is a heterogeneous mixture composed of tiny particles suspended in another material. The particles are larger than molecules but less than 1 µm in diameter. Particles this small do not settle out and pass right through filter paper. Milk is an example of a colloid. The particles can be solid, tiny droplets of liquid, or tiny bubbles of gas; the suspending medium can be a solid, liquid, or gas (although gas-gas colloids aren't possible).