Any of several plants of the family Apiaceae (Umbelliferae), especially cow parsley, Anthriscus sylvestris, and upright hedge-parsley, Torilis japonica.
Origin
Late 17th century; earliest use found in John Aubrey (1626–1697), antiquary and biographer.
Definition of pig's parsley in US English:
pig's parsley
noun
British Regional
Any of several plants of the family Apiaceae (Umbelliferae), especially cow parsley, Anthriscus sylvestris, and upright hedge-parsley, Torilis japonica.
Origin
Late 17th century; earliest use found in John Aubrey (1626–1697), antiquary and biographer.