 | WordWeight : Weighing the Words |
| WordWeight : Weighing the Words |
Phototaxis
Pronunciation : Pho`to*tax"is, Pho"to*tax`y
Part of Speech : n.
Definition : Defn: The influence of light on the movements of low organisms, as various infusorians, the zo?spores of certain alg?, 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.
[NL. phototaxis; photo- + Gr. an arranging.] (Biol.)
Source : Webster's Unabridged Dictionary, 1913
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