caisson
n 1: an ornamental sunken panel in a ceiling or dome [syn:
coffer, caisson, lacuna]
2: a two-wheeled military vehicle carrying artillery ammunition
3: a chest to hold ammunition [syn: caisson, ammunition
chest}]
4: large watertight chamber used for construction under water
[syn: caisson, pneumatic caisson, cofferdam]
caisson nounEtymology: French, from Middle French, from Old Occitan, from
caissa chest, from Latin capsa — more at caseDate:
circa 1702 1.a. a chest to hold ammunition b. a usually 2-wheeled vehicle
for artillery ammunition attachable to a horse-drawn limber; also
a limber with its attached caisson
2.a. a watertight chamber used in construction work under
water or as a foundation b. a hollow floating box or a boat used
as a floodgate for a dock or basin
3.coffer 3
caisson n. 1 a watertight chamber in which underwater construction work can be done. 2 a floating vessel used as a floodgate in docks. 3 an ammunition chest or wagon. Phrases and
idioms: caisson disease = decompression sickness. Etymology: F (f. It. cassone) assim. to caisse CASE(2)
caisson
kəˈsu:n n. 1 a watertight chamber in which underwater construction
work can be done. 2 a floating vessel used as a floodgate in docks. 3 an
ammunition chest or wagon. øcaisson disease = decompression sickness. [F
(f. It. cassone) assim. to caisse CASE(2)]
Caisson \Cais"son\, n. [F., fr. caisse, case, chest. See 1st
Case.]
1. (Mil.)
(a) A chest to hold ammunition.
(b) A four-wheeled carriage for conveying ammunition,
consisting of two parts, a body and a limber. In light
field batteries there is one caisson to each piece,
having two ammunition boxes on the body, and one on
the limber. --Farrow.
(c) A chest filled with explosive materials, to be laid in
the way of an enemy and exploded on his approach.
2.
(a) A water-tight box, of timber or iron within which work
is carried on in building foundations or structures
below the water level.
(b) A hollow floating box, usually of iron, which serves
to close the entrances of docks and basins.
(c) A structure, usually with an air chamber, placed
beneath a vessel to lift or float it.
3. (Arch.) A sunk panel of ceilings or soffits.
Pneumatic caisson (Engin.), a caisson, closed at the top
but open at the bottom, and resting upon the ground under
water. The pressure of air forced into the caisson keeps
the water out. Men and materials are admitted to the
interior through an air lock. See Lock.
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