cochineal

The noun is borrowed from Middle French cochenille (modern French cochenille), from Italian cocciniglia or Spanish cochinilla; further etymology uncertain, possibly from Latin coccineus, coccinus (“scarlet-dyed; scarlet in colour”) (whence Italian coccineo (“scarlet in colour”)) + Italian -iglia (suffix forming collective nouns), Spanish -illa (“diminutive suffix”). Coccinus is derived from Ancient Greek κόκκῐνος (kókkĭnos, “scarlet; (figurative) blushing”, adjective), from κόκκος (kókkos, “kermes oak (Quercus coccifera); insect of the genus Kermes living on the oak; scarlet dye made from crushed kermes insects”) (possibly from Pre-Greek) + -ῐνος (-ĭnos, suffix forming adjectives).

According to the Oxford English Dictionary, cochineal is not derived from Spanish cochinilla (“pill bug, especially the common pill bug (Armadillidium vulgare)”), a diminutive of cochina (“female pig, sow”) (from the animal’s shape), which coincidentally has the same spelling as cochinilla (“cochineal”).

The adjective is derived from the noun.