The Collaborative International Dictionary
Pompelmouses
Pompelmous \Pom"pel*mous\, n.; pl. Pompelmouses. [D. pompelmoes; cf. G. pompelmuse, F. pamplemousse, and F. pompol['e]on.] (Bot.) A shaddock, esp. one of large size.
Wiktionary
pompelmouses
n. (plural of pompelmous English)