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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Boiler \Boil"er\, noun A sunken reef; esp., a coral reef on which the sea breaks heavily. [Webster 1913 Suppl.]
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Boiler \Boil"er\, noun
1. One who boils.
2. A vessel in which any thing is boiled.
Note: The word boiler is a generic term covering a great variety of kettles, saucepans, clothes boilers, evaporators, coppers, retorts, etc.
3. (Mech.) A strong metallic vessel, usually of wrought iron plates riveted together, or a composite structure variously formed, in which steam is generated for driving engines, or for heating, cooking, or other purposes.
Note: The earliest steam boilers were usually spheres or sections of spheres, heated wholly from the outside. Watt used the wagon boiler (shaped like the top of a covered wagon) which is still used with low pressures. Most of the boilers in present use may be classified as plain cylinder boilers, flue boilers, sectional and tubular boilers.
{Barrel of a boiler}, the cylindrical part containing the flues.
{Boiler plate}, {Boiler iron}, plate or rolled iron of about a quarter to a half inch in thickness, used for making boilers and tanks, for covering ships, etc.
{Cylinder boiler}, one which consists of a single iron cylinder.
{Flue boilers} are usually single shells containing a small number of large flues, through which the heat either passes from the fire or returns to the chimney, and sometimes containing a fire box inclosed by water.
{Locomotive boiler}, a boiler which contains an inclosed fire box and a large number of small flues leading to the chimney.
{Multiflue boiler}. Same as {Tubular boiler}, below.
{Sectional boiler}, a boiler composed of a number of sections, which are usually of small capacity and similar to, and connected with, each other. By multiplication of the sections a boiler of any desired capacity can be built up.
{Tubular boiler}, a boiler containing tubes which form flues, and are surrounded by the water contained in the boiler. See Illust. {of Steam boiler}, under {Steam}.
{Tubulous boiler}. See under {Tubulous}. See {Tube}, noun, 6, and 1st {Flue}.
From WordNet (r) 2.0 [wn]:
boiler
noun
1: sealed vessel where water is converted to steam [syn: {steam boiler}]
2: a metal pot for stewing or boiling; usually has a lid [syn: {kettle}]
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