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apheliotropism

[uh-fee-lee-o-truh-piz-uh m, ap-hee-lee-]
noun
  1. apheliotropic tendency or type of growth.
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Origin of apheliotropism

First recorded in 1875–80; apheliotrop(ic) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018