Definition of phototropy in English:

phototropy

noun

  • 1Biology= "phototropism". Now rare.

  • 2Chemistry= "photochromism".

Origin

Late 19th century; earliest use found in Journal of the Royal Microscopical Society. From photo- + -tropy; in sense 1 probably after phototropic; compare also German Phototropie.

Pronunciation

phototropy

/fəʊˈtɒtrəpi/