CEFR C1

heliotaxis

noun

Meaning

Movement or growth in response to sunlight, where an organism moves towards or away from a light source.

Examples

  • The heliotaxis of sunflowers is a well-known example of phototropism in plants.
  • Some bacteria exhibit positive heliotaxis, migrating towards areas with optimal light intensity.

Synonyms: phototaxis, phototropism, sun-tracking