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.
Either of two similar and related Old World spiny shrubs (Ziziphus spina-christi or Paliurus spina-christi) popularly believed to have been used for Jesus's crown of thorns.
Any of several other plants, such as the crown-of-thorns.
[krahysts-thawrn] 
