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

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

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

Whether the sinking was due to epinastic growth, or apheliotropism, we do not know.

From The Power of Movement in Plants by Darwin, Charles

As this latter movement occurred in complete darkness, and with peduncles arising from upright and from dependent branches, it cannot be due to apheliotropism or to epinasty, but must be attributed to geotropism.

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