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apheliotropism

noun
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aph·​e·​li·​ot·​ro·​pism
plural -s

Definition of apheliotropism

: negative heliotropism (as in certain roots that turn away from the sun)

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History and Etymology for apheliotropism

apo- + heliotropism

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“Apheliotropism.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/apheliotropism. Accessed 6 December 2019.

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