mashua (?mæ?u??) n (Plants) a perennial plant, Tropaeolum tuberosum, grown in South America for its edible tuberCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014