phototropism

noun/foʊˈtɑtrəˌpɪzəm/

Frequency rank: #19,982 most common English word

Meaning

the growth or movement of a plant in response to light, either toward or away from the source.

Illustration for the English word “phototropism”

Example sentence

Sunflowers display phototropism by turning their heads to follow sunlight throughout the day.

Synonyms & related words

  • heliotropism
  • phototaxis
  • light-seeking

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