yam bean

/Y AE1 M B IY1 N/
noun
  1. 1

    A tropical vine, Pachyrhizus erosus grown for its crisp, starchy edible root, the jicama.

  2. 2

    Any of the plants in the genus Pachyrhizus, including several similar cultivated species.

Source: https://en.wiktionary.org/wiki/yam%20bean