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

• apogeotropic adjective
• apogeotropically adverb

Etymology

Origin of apogeotropism

First recorded in 1875–80; apo- + geotropism

Example Sentences

De Vries has shown* that the more or less horizontal position of leaves is in most cases influenced by epinasty, by their own weight, and by apogeotropism.

From The Power of Movement in Plants by Darwin, Charles

Nevertheless, they did not rise nearly so much at night, as when subjected to apogeotropism.

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

But the reversal of the first half of the curvature will have been aided by apogeotropism.

From The Power of Movement in Plants by Darwin, Charles

The hooking depends chiefly, as far as we could ascertain, on the tip being affected by epinasty and geotropism; the lower and older parts continually straightening themselves through hyponasty and apogeotropism.

From The Power of Movement in Plants by Darwin, Charles