| 单词 | caisson |
| 释义 | caisson —caissoned, adj. /kay"seuhn, -son/, n. 1. a structure used in underwater work, consisting of an airtight chamber, open at the bottom and containing air under sufficient pressure to exclude the water. 2. a boatlike structure used as a gate for a dock or the like. 3. Naut. a. Also called camel, pontoon. a float for raising a sunken vessel, sunk beside the vessel, made fast to it, and then pumped out to make it buoyant. b. a watertight structure built against a damaged area of a hull to render the hull watertight; cofferdam. 4. a two-wheeled wagon, used for carrying artillery ammunition. 5. an ammunition chest. 6. a wooden chest containing bombs or explosives, used formerly as a mine. 7. Archit. coffer (def. 4). [1695-1705; < F, MF < OPr, equiv. to caissa box (see CASE2) + -on aug. suffix] |
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