Definition of paraheliotropism in English:

paraheliotropism

noun

Botany
  • A type of tropism in which a plant's leaves move to reduce injuriously intense illumination, usually by keeping their blades parallel to the light rays.

Origin

Late 19th century; earliest use found in Charles Darwin (1809–1882), naturalist, geologist, and originator of the theory of natural selection. From para- + heliotropism, probably after paraheliotropic.

Pronunciation

paraheliotropism

/ˌparəhiːlɪə(ʊ)ˈtrəʊpɪz(ə)m//ˌparəhiːlɪˈɒtrəpɪz(ə)m/