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Definition of: paraheliotropism

(par′ə·hē′lē·otrə·piz′əm) noun Bot.
A manifestation of irritability in motile leaves when exposed to bright sunlight, whereby they assume such a position that their surfaces are parallel to the direction of the incident rays; diurnal sleep of leaves.
—par
a·heli·o·trop′ic (-ə·tropik) adjective

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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