apheliotropic

American  

[a-fee-lee-uh-trop-ik, -troh-pik, ap-hee-] / æˌfi li əˈtrɒp ɪk, -ˈtroʊ pɪk, æpˌhi- /

adjective

Botany.

1. turning or growing away from the sun.

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apheliotropic British  

/ əˌfiː-, æpˌhiːlɪˈɒtrəˌpɪzəm, əˌfiː-, æpˌhiːlɪəˈtrɒpɪk /

adjective

1. biology growing in a direction away from the sunlight

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Other Word Forms

• apheliotropically adverb
• apheliotropism noun

Etymology

Origin of apheliotropic

First recorded in 1875–80; ap- ² + heliotropic

Example Sentences

Both tracings showed that the apheliotropic movement was a modified form of circumnutation.

From The Power of Movement in Plants by Darwin, Charles

Bignonia capreolata: apheliotropic movement of a tendril, traced on a horizontal glass from 6.45 A.M.

From The Power of Movement in Plants by Darwin, Charles

Of the 54 cauterised radicles one case was doubtful, 25 curved themselves from the light in the normal manner, and 28, or more than half, were not in the least apheliotropic.

From The Power of Movement in Plants by Darwin, Charles

Some tendrils which consist of modified leaves—organs in all ordinary cases strongly diaheliotropic—have been rendered apheliotropic, and their tips crawl into any dark crevice.

From The Power of Movement in Plants by Darwin, Charles

The stems of very young plants of Tropaeolum majus are highly heliotropic, whilst those of older plants, according to Sachs, are slightly apheliotropic.

From The Power of Movement in Plants by Darwin, Charles