Meaning

noun any of several herbs of the genus Taraxacum having long tap roots and deeply notched leaves and bright yellow flowers followed by fluffy seed balls

originFrom Middle English dentdelyon, from Old French dent de lion (“lion's tooth”), also in Latin dēns leōnis, referring to the jagged shape of the plant's leaves. The term is now rare in French (together with liondent, calque from Germanic), but compare Spanish diente de león, Portuguese dente-de-leão, Italian dente di leone, German Löwenzahn, Norwegian Bokmål løvetann, Welsh dant y llew, all…

Etymology from Wiktionary, CC BY-SA 3.0