apogeotropism

American  

[ap-uh-jee-o-truh-piz-uhm] / ˌæp ə dʒiˈɒ trəˌpɪz əm /

noun

Biology.

1. growth or orientation away from the earth; negative geotropism.

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apogeotropism British  

/ ˌæpəˌdʒɪəˈtrɒpɪk, ˌæpədʒɪˈɒtrəˌpɪzəm /

noun

1. negative geotropism, as shown by plant stems

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Other Word Forms

Derived Forms

• apogeotropically
  adverb
• apogeotropic
  adjective

Etymology

Origin of apogeotropism

First recorded in 1875–80; apo- + geotropism

Example Sentences

With respect to apogeotropism, De Vries maintains that it generally comes into play, and of this fact we shall presently advance some indirect evidence.

From The Power of Movement in Plants by Darwin, Charles

Different species and different parts of the same species are acted on by apogeotropism in very different degrees.

From The Power of Movement in Plants by Darwin, Charles

This movement is directly the reverse of apogeotropism.

From The Power of Movement in Plants by Darwin, Charles

In the morning, up to about 11 A.M., they moved in zigzag lines towards the light; and at night they again became almost upright through apogeotropism.

From The Power of Movement in Plants by Darwin, Charles

Here then we have a good opportunity for observing how apogeotropism acts when very nearly balanced by an opposing force.

From The Power of Movement in Plants by Darwin, Charles