The Collaborative International Dictionary
Cow parsley
Cow parsley \Cow" pars`ley\ (kou` p?rs`l?). (Bot.) An umbelliferous plant of the genus Ch[ae]rophyllum ( Ch[ae]rophyllum temulum and Ch[ae]rophyllum sylvestre).
Wiktionary
cow parsley
n. 1 (taxlink Anthriscus sylvestris species noshow=1), a weedy biennial umbellifer native to the Old World. 2 (context by extension English) Any of a variety of plants of similar appearance.
WordNet
cow parsley
n. coarse erect biennial Old World herb introduced as a weed in eastern North America [syn: wild chervil, Anthriscus sylvestris]