1) Biology terminology 2) Movement towards light 
Phototaxis is a kind of taxis, or locomotory movement, that occurs when a whole organism moves towards or away from stimulus of light. This is advantageous for phototrophic organisms as they can orient themselves most efficiently to receive light for photosynthesis. Phototaxis is called positive if the movement is in the direction of increasing li...
growth or movement determined by light
• (n.) Alt. of Phototaxy
(fo″to-tak´sis) taxis of cells and microorganisms under the influence of light. adj., phototac´tic., adj.
Movement towards light.Movement of a cell or organism towards (positive phototaxis) or away from (negative p.) a source of light.
Type: Term Pronunciation: fō′tō-tak′sis Definitions: 1. Reaction of living protoplasm to the stimulus of light, involving bodily motion of the whole organism toward (positive phototaxis) or away from (negative phototaxis) the stimulus.
phototaxis, phototaxy 1. The movement of an organism in response to color or light pattern stimulus. 2. Taxis of an organism elicited in response to the source of a light stimulus. 3. In botany, the movement of a part of a plant toward or away from light sources.
directional movement using flagella in response to light