Definitions
from The Century Dictionary.
- noun In botany, the tendency of a plant or of the organs of a plant to assume a more or less transverse position to the light.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Bot.) A tendency of leaves or other organs of plants to have their dorsal surface faced towards the rays of light.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun botany A
tendency ofleaves or otherplant organs to have theirdorsal surface facing towards therays oflight .
Etymologies
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Examples
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In this case diaheliotropism would perhaps conquer the ordinary movements of the leaves when they awake, and [assume] their diurnal horizontal position.
More Letters of Charles Darwin — Volume 2 Charles Darwin 1845
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As the leaflets are alternate, and as the upper surface will be somewhat exposed to the dawning light, it is perhaps diaheliotropism which explains your extraordinary case.
More Letters of Charles Darwin — Volume 2 Charles Darwin 1845
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