phototropism /pho·tot·ro·pism/ (fo-tot´rah-pizm)
1. the tendency of an organism to turn or move toward or away from light.
2. color change produced in a substance by the action of light.phototrop´ic
pho·tot·ro·pism (f -t t r -p z m)n. Growth or movement of a sessile organism toward or away from a source of light. pho to·tropic (ft-trpk, -trpk) adj. |
phototropism
1. the tendency of an organism to turn or move toward (positive phototropism) or away from (negative phototropism) light.
2. change of color produced in a substance by the action of light.
phototropism
Reaction of certain plants and animals to move towards (positive phototropism) or away from (negative phototropism) a source of light.
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