What is "vianda"

Vianda is a starchy tropical root or tuber such as yucca, yautia, cassava, malanga, taro and sweet potatoes, green plantains are also included. They are used in various cuisines and dishes. The word vianda can also be used to mean food or meal. Dishes using viandas include: viandas con bacalao (root vegetables with salted cod). The word vianda is believed to be derived from the Latin word vivanda, a late adaptation of vivenda.