Pārs'ley, n.

n. [O. Eng. perseley, perselee, percile, Fr. persil, Pr. peressilh, peyressilh, Pg. perrexil, Sp. perejil, It. petrosellino, petrosello, petrosillo, petrose-molo, Lat. petroselinum, Gr. πετροσέλινον, rock-parsley, from πέτρος, a rock, and σέλινον, parsley; A-S. peterselige, D. pieterselie, Ger. petersilie, Dan. petersille, persille, Sw. persilja, Ir. peirsil, W. perllus.] (Bot.) A plant of the genus Petroselinum, the leaves of which are used in cookery, and the root as an aperient medicine.

Fool's parsley, a poisonous plant (Æthusa Cynopium), much resembling parsley, and sometimes mistaken for it.