Dictionary.com
definitions
  • synonyms

photonasty

noun plural -ties
  1. a nastic movement in response to a change in light intensity
Show More
Derived Formsphotonastic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012