jerusalem_thorn has definitions from the field of botany
[ noun ] (botany) large shrub or shrubby tree having sharp spines and pinnate leaves with small deciduous leaflets and sweet-scented racemose yellow-orange flowers; grown as ornamentals or hedging or emergency food for livestock; tropical America

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shrub Parkinsonia

[ noun ] (botany) spiny tree having dark red edible fruits

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shrub Ziziphus jujube

[ noun ] (botany) thorny Eurasian shrub with dry woody winged fruit

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shrub Paliurus

[ noun ] (botany) East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu