heliotropism

English

Etymology

From helio- +‎ -tropism.

Noun

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

• heliotropic

Related terms

• heliotrope

Translations

the property of some plants of turning under the influence of light

• French: héliotropisme (fr) m
• Georgian: ჰელიოტროპიზმი (helioṭroṗizmi)
• Irish: héileatrópacht f
• Italian: eliotropismo m
• Portuguese: heliotropismo (pt) m
• Russian: гелиотропи́зм (ru) m (geliotropízm)
• Spanish: heliotropismo (es) m

Romanian

Etymology

Borrowed from French héliotropisme.

Noun

heliotropism n (uncountable)

1. heliotropism

Declension

declension of heliotropism (singular only)

	singular
n gender	indefinite articulation	definite articulation
nominative/accusative	(un) heliotropism	heliotropismul
genitive/dative	(unui) heliotropism	heliotropismului
vocative	heliotropismule