[pon-toon] 
| 1. | Military. a boat or some other floating structure used as one of the supports for a temporary bridge over a river. |
| 2. | a float for a derrick, landing stage, etc. |
| 3. | Nautical. a float for raising a sunken or deeply laden vessel in the water; a camel or caisson. |
| 4. | a seaplane float. |
[pon-tn] .