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Definitions for: Phototaxis
Webster (1913) Definition: Pho`to*tax"is, Phototaxy Pho"to*tax`y, n. [NL.
phototaxis; photo- + Gr. ? an arranging.] (Biol.)
The influence of light on the movements of low organisms, as
various infusorians, the zo["o]spores of certain alg[ae],
etc.; also, the tendency to follow definite directions of
motion or assume definite positions under such influence. If
the migration is toward the source of light, it is termed
positive phototaxis; if away from the light,
negative phototaxis. -- Pho`to*tac"tic, a. --
Pho`to*tac"tic*al*ly, adv.
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