单词 | caisson |
释义 | caisson/ˈkeɪs(ə)n / /kəˈsuːn /noun 1A large watertight chamber, open at the bottom, from which the water is kept out by air pressure and in which construction work may be carried out under water.The seal course at the bottom of the caissons is 8 m thick and required about 6,000 m³ of underwater concrete....
1.1A floating vessel or watertight structure used as a gate across the entrance of a dry dock or basin.These floats transported the great floating concrete caissons which formed the sea walls of the Mulberry Harbours....
2 historical A chest or wagon for holding or conveying ammunition.Graves were everywhere; dead soldiers and horses lay unburied; and destroyed wagons and caissons littered the area....
OriginLate 17th century: from French, literally 'large chest', from Italian cassone, the spelling having been altered in French by association with caisse 'case'. Rhymes |
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