Definitions for heliotropism
ˌhi liˈɒ trəˌpɪz əm, -əˈtroʊ pɪz-he·liotropism

Princeton's WordNetRate this definition:0.0 / 0 votes

1. heliotropismnoun

   an orienting response to the sun

WiktionaryRate this definition:4.0 / 1 vote

1. heliotropismnoun

   The property of some plants of turning under the influence of light; either positively (towards the light) or negatively (away from the light)

WikipediaRate this definition:5.0 / 1 vote

1. Heliotropism

   Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn". The Greeks assumed it to be a passive effect, presumably the loss of fluid on the illuminated side, that did not need further study. Aristotle's logic that plants are passive and immobile organisms prevailed. In the 19th century, however, botanists discovered that growth processes in the plant were involved, and conducted increasingly in-depth experiments. A. P. de Candolle called this phenomenon in any plant heliotropism (1832). It was renamed phototropism in 1892, because it is a response to light rather than to the sun, and because the phototropism of algae in lab studies at that time strongly depended on the brightness (positive phototropic for weak light, and negative phototropic for bright light, like sunlight). A botanist studying this subject in the lab, at the cellular and subcellular level, or using artificial light, is more likely to employ the more abstract word phototropism, a term which includes artificial light as well as natural sunlight. The French scientist Jean-Jacques d'Ortous de Mairan was one of the first to study heliotropism when he experimented with the Mimosa pudica plant. The phenomenon was studied by Charles Darwin and published in his penultimate 1880 book The Power of Movement in Plants , a work which included other stimuli to plant movement such as gravity, moisture and touch.

ChatGPTRate this definition:5.0 / 1 vote

1. heliotropism

   Heliotropism is a biological phenomenon in which plants or other organisms move or grow in response to the direction of the sun or sunlight. It is a type of tropism, specifically towards sunlight. This movement can be either towards the sunlight (positive heliotropism) or away from the sunlight (negative heliotropism). The purpose is typically to maximize photosynthesis or to optimize exposure to sunlight.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Heliotropismnoun

   the phenomenon of turning toward the light, seen in many leaves and flowers

2. Etymology: [Helio- + Gr. to turn.]

WikidataRate this definition:0.0 / 0 votes

1. Heliotropism

   Heliotropism is the diurnal motion or seasonal motion of plant parts in response to the direction of the sun. It is a tropism. The habit of some plants to move in the direction of the sun was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning sun turn. The Greeks assumed it to be a passive effect, presumably the loss of fluid on the illuminated side, that did not need further study. Aristotle's logic that plants are passive and immobile organisms, prevailed. In the 19th century, however, botanists discovered that growth processes in the plant were involved, and conducted increasingly ingenious experiments. A. P. de Candolle called this phenomenon in any plant heliotropism. It was renamed phototropism in 1892, because it is a response to light rather than to the sun, and because the phototropism of algae in lab studies at that time strongly depended on the brightness. A botanist studying this subject in the lab, at the cellular and subcellular level, or using artificial light, is more likely to employ the more abstract word phototropism. In ordinary language, the words are synonymous.

Matched Categories

1. • Tropism

Usage in printed sourcesFrom: 

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How to pronounce heliotropism?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say heliotropism in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of heliotropism in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of heliotropism in Pythagorean Numerology is: 6

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=heliotropism
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Heliotropism
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Heliotropism
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/heliotropism
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=heliotropism
7. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=heliotropism