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Definition of Tyndall effect
1. Noun. The phenomenon in which light is scattered by very small particles in its path; it makes a beam of light visible; the scattered light is mainly blue.
Generic synonyms: Optical Phenomenon
Medical Definition of Tyndall effect
1. The visibility of floating particles in gases or liquids when illuminated by a ray of sunlight and viewed at right angles to the illuminating ray. Synonym: Tyndall effect. (05 Mar 2000)