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heliotropism

(hē′lē ä′trə piz′əm)

noun

any positive, or negative, turning or bending of a plant or sessile animal toward, or away from, light, esp. sunlight

Origin: helio- + -tropism

Related Forms:

heliotropic adjective
heliotropically adverb

See heliotropism in American Heritage Dictionary 4

noun

Growth or orientation of a sessile organism, especially a plant, toward or away from the light of the sun.

Related Forms:

heˌli·o·tropˈic (-ə-trŏpˈĭk) adjective

heˌli·o·tropˈi·cal·ly adverb

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