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boiler 音標拼音: [b'ɔɪlɚ] n. 煮器,汽鍋,鍋爐 煮器,汽鍋,鍋爐 boiler n 1: sealed vessel where water is converted to steam [ synonym: { boiler}, { steam boiler}] 2: a metal pot for stewing or boiling; usually has a lid [ synonym: { kettle}, { boiler}] Boiler \ Boil" er\, n. 1. One who boils. [ 1913 Webster] 2. A vessel in which any thing is boiled. [ 1913 Webster] Note: The word boiler is a generic term covering a great variety of kettles, saucepans, clothes boilers, evaporators, coppers, retorts, etc. [ 1913 Webster] 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. [ 1913 Webster] 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. [ 1913 Webster] { 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}, n., 6, and 1st { Flue}. [ 1913 Webster]
Boiler \ Boil" er\, n. A sunken reef; esp., a coral reef on which the sea breaks heavily. [ Webster 1913 Suppl.]
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