apheliotropism

American  

[uh-fee-lee-o-truh-piz-uhm, ap-hee-lee-] / əˌfi liˈɒ trəˌpɪz əm, æpˌhi li- /

noun

1. apheliotropic tendency or type of growth.

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Etymology

Origin of apheliotropism

First recorded in 1875–80; apheliotrop(ic) + -ism

Example Sentences

These internodes were either not old enough, or the light was not sufficiently bright, to induce apheliotropism, for both plants bent slowly towards, instead of from the window during four days.

From The Power of Movement in Plants by Darwin, Charles

We are thus led to infer that the downward curvature is due to apheliotropism; though more trials ought to have been made.

From The Power of Movement in Plants by Darwin, Charles

Many organs bend downwards through epinasty or apheliotropism or from their own weight; but we have met with very few cases of a downward movement in sub-aërial organs due to geotropism.

From The Power of Movement in Plants by Darwin, Charles

Apheliotropism.—We succeeded in observing only two cases of apheliotropism, for these are somewhat rare; and the movements are generally so slow that they would have been very troublesome to trace.

From The Power of Movement in Plants by Darwin, Charles

It is probable that if the tips had been cauterised for the length of a whole millimeter, all signs of apheliotropism would have disappeared.

From The Power of Movement in Plants by Darwin, Charles