phototaxis noun. [fǝʊtǝʊ'taksɪs] Pl. -taxes [-'taksi:z]. L19.
[from PHOTO- + -TAXIS.]
Biology. The bodily movement or orientation of a motile organism in response to light; an instance of this. Also = PHOTOTROPISM 1.

■ phototactic adjective exhibiting or characterized by phototaxis L19.

■ phototactically adverb E20.

[TahlilGaran] English Dictionary ▲