heliotropism

From Wiktionary, the free dictionary
Jump to navigation Jump to search

English

[edit]
English Wikipedia has an article on:
Wikipedia

Etymology

[edit]

From helio- +‎ -tropism.

Noun

[edit]

heliotropism (countable and uncountable, plural heliotropisms)

  1. The property of some plants of turning under the influence of light; either positively (towards the light) or negatively (away from the light)
    • 1880 November 6, Charles Darwin, Francis Darwin, chapter XII, in The Power of Movement in Plants[1], page 555:
      As soon as the faintest ray of light reaches a seedling, heliotropism will guide it through any crack in the soil, or through an entangled mass of overlying vegetation; []
    • 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.

Derived terms

[edit]
[edit]

Translations

[edit]

Romanian

[edit]

Etymology

[edit]

Borrowed from French héliotropisme.

Noun

[edit]

heliotropism n (uncountable)

  1. heliotropism

Declension

[edit]