heliotropic

[ hee-lee-uh-trop-ik, -troh-pik ]

Phonetic (Standard)IPA

adjective

, Biology.

First recorded in 1870–75; helio- + -tropic

We must therefore conclude that the heliotropic curvature of the polyps is determined by a photochemical action of the light.

The eyes of this heliotropic machine consist of two lenses in whose focus is situated the retina consisting of selenium wire.

In this way the machine follows a lantern in a dark room in a way similar to that of a positively heliotropic animal.

When the queen founds her nest she loses her wings and becomes negatively heliotropic again.

Kellogg241 has shown that the nuptial flight of the bees is also a purely heliotropic phenomenon.

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