dandelion

From 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 descendants, calques, or loan translations of the Latin term. First attested in the late 14th c.

Displaced various words, including native Old English ǣġwyrt, native Middle English houndes-tooth, and English tell-time and swine's snout; and mostly displaced English cankerwort, monk's head, and pissabed.