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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 pon·toon /pɑnˈtun/

From: Webster's Revised Unabridged Dictionary (1913)

 Pon·toon n.
 1. Mil. A wooden flat-bottomed boat, a metallic cylinder, or a frame covered with canvas, India rubber, etc., forming a portable float, used in building bridges quickly for the passage of troops.
 2. Naut. A low, flat vessel, resembling a barge, furnished with cranes, capstans, and other machinery, used in careening ships, raising weights, drawing piles, etc., chiefly in the Mediterranean; a lighter.
 Pontoon bridge, a bridge formed with pontoons.
 Pontoon train, the carriages of the pontoons, and the materials they carry for making a pontoon bridge.
 Note:The French spelling ponton often appears in scientific works, but pontoon is more common form.

From: WordNet (r) 2.0

      n 1: (nautical) a floating structure (as a flat-bottomed boat)
           that serves as a dock or to support a bridge
      2: a float supporting a seaplane