DEWAR VESSEL n.
A double-walled glass vessel for holding liquid air, etc., having the space between the walls exhausted so as to prevent conduction of heat, and sometimes having the glass silvered to prevent absorption of radiant heat; -- called also, according to the particular shape, Dewar bulb, Dewar tube, etc.
DIG v.
More's Utopia). To dig down, to undermine and cause to fall by digging; as, to dig down a wall. -- To dig from, out of, out, or up, to get out or obtain by digging; as, to dig coal from or out of a mine; to dig out fossils; to dig up a tree. The preposition is often omitted; as, the men are digging coal, digging iron…
DISCHARGE v.
(Arch.), an arch over a door, window, or other opening, to distribute the pressure of the wall above. See Illust. of Lintel. -- Discharging piece, Discharging strut (Arch.), a piece set to carry thrust or weight to a solid point of support. -- Discharging rod (Elec.), a bent wire, with knobs at both ends, and insulat…
DISMANTLE v.
To strip of furniture and equipments, guns, etc.; to unrig; to strip of walls or outworks; to break down; as, to dismantle a fort, a town, or a ship. A dismantled house, without windows or shutters to keep out the rain. Macaulay.
DOCK n.
hich the water may be shut or pumped out, especially, one in the form of a chamber having walls and floor, often of masonry and communicating with deep water, but having appliances for excluding it; -- used in constructing or repairing ships. The name includes structures used for the examination, repairing, or building…