apheliotropic en · ADJ
Etymology
From apo- + heliotropic.
Meanings
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(not-comparable) Turning away from the sun; said of leaves, etc.
But some tendrils are apheliotropic, for instance those of Bignonia capreolata and of Smilax aspera; and the stems of some plants which climb by rootlets, as those of the Ivy and Tecoma radicans, are likewise apheliotropic, and they thus find a support.
1880, Charles Darwin, The power of movement in plants (London: John Murray, p. 450-451) online