The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.
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phototaxis
property of mobile organisms to move in response to light
Note 1 to entry: For example, positive phototaxis involves movement (such as in swimming) towards a source of optical radiation and negative phototaxis away from such a source.
Note 2 to entry: This entry was numbered 17-944 in CIE S 017:2011.