Noun head lettuce has 1 sense
  1. head lettuce, Lactuca sativa capitata - distinguished by leaves arranged in a dense rosette that develop into a compact ball
    --1 is a kind of lettuce
    --1 is a member of Lactuca, genus Lactuca
    --1 has parts:
     butterhead lettuce; crisphead lettuce, iceberg lettuce, iceberg
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