any of certain Old World thorny shrubs or small trees supposed to have been used for Christ's crown of thorns, as the Jerusalem thorn, Paliurus spina-christi, or the jujube, Ziziphus jujuba.
Origin of Christ's-thorn
1555–65; translation of Latin spīna Chrīstī
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any of several rhamnaceous plants of SW Asia, such as Paliurus spina-christi or the jujube, that have thorny stems and are popularly believed to have been used for Christ's Crown of Thorns
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