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phototaxis

   Also found in: Dictionary/thesaurus, Wikipedia 0.06 sec.
phototaxis /pho·to·tax·is/ (-tak´sis) the movement of cells and microorganisms in response to light.phototac´tic
pho·to·tax·is (ft-tkss)
n.
The movement of an organism or cell toward or away from a source of light.
photo·tactic (-tktk) adj.
phototaxis
the movement of cells and microorganisms under the influence of light.
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