mandioc man·dioc uncommon obsolete noun 1. cassava with long tuberous edible roots and soft brittle stems; used especially to make cassiri (an intoxicating drink) and tapioca Synonymsbitter cassavamaniocmandiocatapioca plantgariManihot esculentaManihot utilissima Related words Word family mandioca Broader terms cassava Part of cassavacassiri WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.