Photo-epinasty
Pronunciation : Pho`to-ep"i*nas`ty
Part of Speech : n.
Etymology : [See Photo-, and Epinastic.] (Bot.)
Definition : Defn: A disproportionately rapid growth of the upper surface of dorsiventral organs, such as leaves, through the stimulus of exposure to light. Encyc. Brit.
Source : Webster's Unabridged Dictionary, 1913