fil·bert /ˈfɪlbɚ/
 榛樹,榛子


 fil·bert n.
 1. Bot. The fruit of the Corylus Avellana or Corylus maxima, also called the hazel; the hazelnut.  It is an oval nut, containing a kernel that has a mild, farinaceous, oily taste, agreeable to the palate.
 Note: ☞ In England filberts are usually large hazelnuts, especially the nuts from selected and cultivated trees.  The American hazelnuts are of two other species, Corylus Americana and Corylus cornuta, and are also sometimes called filberts.
 Filbert gall Zool., a gall resembling a filbert in form, growing in clusters on grapevines.  It is produced by the larva of a gallfly (Cecidomyia).

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 filbert
      n 1: small nut-bearing tree much grown in Europe [syn: cobnut,
           Corylus avellana, Corylus avellana grandis]
      2: nut of any of several trees of the genus Corylus [syn: hazelnut,
          cobnut, cob]