pyracanth (n.)

thorny shrub of the apple family, 1660s, from Modern Latin genus name Pyracantha, from Greek pyrakantha (Dioscorides), a plant named but not described, from pyr "fire" (from PIE root *paewr- "fire") + akantha "thorn, thorny plant," from PIE root *ak- "be sharp, rise (out) to a point, pierce."

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