Definition of Caissan
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.
- Webster's Unabridged Dictionary (1913)
- an enclosure, from which water can be expelled, in order to give access to underwater areas for engineering works etc
- the gate across the entrance to a dry dock
- (nautical) a floating tank that can be submerged, attached to an underwater object and then pumped out to lift the object by buoyancy; a camel
- a two-wheeled, horse-drawn military vehicle used to carry ammunition (and a coffin at funerals); a large box to hold ammunition
French
- box
- The Nuttall Encyclopedia
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The correct Spelling of this word is: Caisson
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