Dictionary.com
definitions

sticktight

[stik-tahyt]
noun
  1. any of several composite plants of the genus Bidens, having barbed achenes that adhere to clothing or fur.
  2. any of various other plants having seeds that adhere to clothing or fur.
  3. a seed of any of these plants.

Origin of sticktight

noun use of verb phrase stick tight
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for sticktight

sticktight

noun
  1. any of various plants, esp the bur marigold, that have barbed clinging fruits
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