/ (ˈθɜːməʊˌnæstɪ) /
botany a nastic movement in response to a temperature change, as occurs in the opening of certain flowers
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
Examples from the Web for thermonasty
Further tests will be given later, to distinguish the phenomenon of Thermonasty from that of Thermo-geotropism.
I shall for convenience distinguish the differential growth under temperature variation as Thermonasty proper.