heliotropyn.
rare.
= heliotropism n.
ΚΠ
1883 Nat. Educ. XXIV. No. 6. 6 The author applies the name selenotropy to these motions, as contrasted with heliotropy produced by the sun.
This entry has not yet been fully updated (first published 1898; most recently modified version published online June 2019).
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n.1883