The Collaborative International Dictionary of English v.0.48:
casava \casava\ n. any of several plants of the genus Manihot having fleshy roots yielding a nutritious starch. Syn: cassava. [WordNet 1.5]WordNet (r) 3.0 (2006):
casava n 1: any of several plants of the genus Manihot having fleshy roots yielding a nutritious starch [syn: cassava, casava]