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."