"grapefruit" in the noun sense
1. grapefruit, Citrus paradisi
citrus tree bearing large round edible fruit having a thick yellow rind and juicy somewhat acid pulp
2. grapefruit
large yellow fruit with somewhat acid juicy pulp usual serving consists of a half
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License