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Colloid. A substance made up of more or less discrete minute particles whose size range lies between that of large molecular entities on the one hand and magnitudes that are just below the discernment level by the naked eye on the other, and whose properties are greatly influenced by the large specific surface areas of its particulate components. Colloids exist as systems in which one or more substance is dispersed in another substance or medium that forms the continuous phase, examples being suspensions (q.v.) and emulsions (q.v.) and, of special interest to bakers, batters and doughs.