Boiler

n.	1.	One who boils.
	2.	A vessel in which any thing is boiled.
	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. Barrel of a boiler the cylindrical part containing the flues. Boiler plate 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, n., 6, and 1st Flue.
	1.	A sunken reef; esp., a coral reef on which the sea breaks heavily.

Noun	1.	boiler - sealed vessel where water is converted to steam Synonyms: steam boiler
	2.	boiler - a metal pot for stewing or boiling; usually has a lid Synonyms: kettle

boil, kettle, pot, teakettle

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