heliotropism

Noun

 * 1) The property of some plants of turning under the influence of light; either positively (towards the light) or negatively (away from the light)
 * 2) * 2012, Staff (University of Wisconsin-Madison), Sunflowers inspire more efficient solar power system, R&D Magazine, online:
 * A field of young sunflowers will slowly rotate from east to west during the course of a sunny day, each leaf seeking out as much sunlight as possible as the sun moves across the sky through an adaptation called heliotropism.
 * A field of young sunflowers will slowly rotate from east to west during the course of a sunny day, each leaf seeking out as much sunlight as possible as the sun moves across the sky through an adaptation called heliotropism.

Translations

 * French:
 * Georgian: ჰელიოტროპიზმი
 * Irish: héileatrópacht
 * Italian: eliotropismo
 * Portuguese:
 * Russian:
 * Spanish:

Etymology
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