Jambura

The pomelo, Citrus maxima or Citrus grandis, also called pomello, pummelo, pommelo, pamplemousse, jabong (Hawaii), batabi or jambura (Bengali), zambura (Sylheti) or shaddock, is a natural (non-hybrid) citrus fruit, similar in appearance to a large grapefruit, native to South and Southeast Asia.The pomelo is one of the four original citrus species from which the rest of cultivated citrus hybridized.

Bio from Wikipedia - See more on en.wikipedia.org Text under CC-BY-SA license