de·duct·ible /dɪˈdʌktəbəl, di-/
 (a.)可扣除的
 De·duct·i·ble a.
 1. Capable of being deducted, taken away, or withdrawn.
 Not one found honestly deductible
 From any use that pleased him.   --Mrs. Browning.
 2. Deducible; consequential.
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 deductible
      adj : acceptable as a deduction (especially as a tax deduction)
            [ant: nondeductible]
      n 1: (taxes) an amount that can be deducted (especially for the
           purposes of calculating income tax)
      2: a clause in an insurance policy that relieves the insurer of
         responsibility to pay the initial loss up to a stated
         amount