Armand Jean du Ples⋅sis /arˈmɑ̃ ʒɑ̃ dü plɛˈsi/Show Spelled Pronunciation[ar-mahn zhahn dy ple-see]Show IPA, Duc de, 1585–1642, French cardinal and statesman.
2.
a river in SE Canada, in Quebec, flowing N from Lake Champlain to the St. Lawrence. 210 mi. (340 km) long.