#citron  large lemonlike fruit with thick aromatic rind; usually preserved
  supertype:  citrus_fruit__citrus  any of numerous fruits of the genus Citrus having thick rind and juicy pulp; grown in warm regions
  part of:  citron_tree__citron__Citrus_medica  thorny evergreen small tree or shrub of India widely cultivated for its large lemonlike fruits that have thick warty rind

No statement uses or specializes citron; click here to add one.