What does "phototaxic" mean?

Having a tendency to adjust orientation in response to light. A plant or sedentary animal that is positively phototaxic will lean or grow toward light. One that is negatively phototaxic will lean or grow away from light.

Phototaxic

adj

adj ·Rare ·Advanced level

Definitions

Adjective

1
Having a tendency to adjust orientation in response to light. A plant or sedentary animal that is positively phototaxic will lean or grow toward light. One that is negatively phototaxic will lean or grow away from light.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.