10 letters · 18 points in Scrabble
noun any plant of the genus Delphinium having palmately divided leaves and showy spikes of variously colored spurred flowers; some contain extremely poisonous substances
originFrom the genus name (translingual Delphinium), from Ancient Greek δελφῐ́νῐον (delphĭ́nĭon, “larkspur”).
Etymology from Wiktionary, CC BY-SA 3.0