gravitropism

noun

gra·​vit·​ro·​pism grə-ˈvi-trə-ˌpi-zəm How to pronounce gravitropism (audio)
: a tropism (as of plant roots or shoots) in which gravity is the stimulus : geotropism
No matter what the orientation of a seed for instance, the roots will always grow down to the soil. This has a special name, gravitropism, and is movement in response to the force of gravity …Jeanette Mackay

Examples of gravitropism in a Sentence

Recent Examples on the Web In most trees, their sensitivity to the Earth's gravitational pull, called gravitropism, counteracts their will to bend toward light, keeping them upright. Nathaniel Scharping, Discover Magazine, 6 June 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'gravitropism.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

gravi(ty) + -tropism

First Known Use

1969, in the meaning defined above

Time Traveler
The first known use of gravitropism was in 1969

Dictionary Entries Near gravitropism

Cite this Entry

“Gravitropism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gravitropism. Accessed 14 Apr. 2024.

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