any wasp of the family Cynipidae, the larvae of which form characteristic galls on plants.
Origin of gall wasp
First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any small solitary wasp of the family Cynipidae and related families that produces galls in plant tissue, which provide shelter and food for the larvae
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