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Pronunciation: he'le-o-tak'sis

Definition: A form of phototaxis, and perhaps of thermotaxis, in which there is a tendency to growth or movement toward (positive heliotaxis) or away from (negative heliotaxis) the sun or the sunlight.

Synonym(s): heliotropism

[helio- + G. taxis, orderly arrangement]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.