Photo-epinasty

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Photo-epinasty \Pho`to-ep"i*nas`ty\, n. [See {Photo-}, and
     {Epinastic}.] (Bot.)
     A disproportionately rapid growth of the upper surface of
     dorsiventral organs, such as leaves, through the stimulus of
     exposure to light. --Encyc. Brit.
     [1913 Webster]