che·val-de-frise /ʃəˌvældəˈfriz/
 Che·val-de-frise n.; commonly used in the pl. Chevaux-de-frise.  Mil. A piece of timber or an iron barrel traversed with iron-pointed spikes or spears, five or six feet long, used to defend a passage, stop a breach, or impede the advance of cavalry, etc.
    Obstructions of chain, boom, and cheval-de-frise.   --W. Irving.
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 cheval-de-frise
      n : defensive structure consisting of a movable obstacle
          composed of barbed wire or spikes attached to a wooden
          frame; used to obstruct cavalry [syn: chevaux-de-frise]
      [also: chevaux-de-frise (pl)]