Noun grapefruit has 2 senses
  1. grapefruit, Citrus paradisi - citrus tree bearing large round edible fruit having a thick yellow rind and juicy somewhat acid pulp
    --1 is a kind of citrus, citrus tree
    --1 is a member of genus Citrus
    --1 has parts: grapefruit
  2. grapefruit - large yellow fruit with somewhat acid juicy pulp; usual serving consists of a half
    --2 is a kind of
    citrus, citrus fruit, citrous fruit
    --2 is a part of grapefruit, Citrus paradisi
    --2 has part: grapefruit peel
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