Sinonimi: steam boiler
Sealed vessel where water is converted to steam; SYN. steam boiler.
Any vessel that converts water into steam. Boilers are used in conventional power stations to generate steam to feed steam turbines, which drive the electricity generators. They are also used in steamships, which are propelled by steam turbines, and in steam locomotives. Every boiler has a furnace in which fuel (coal, oil, or gas) is burned to produce hot gases, and a system of tubes in which heat is transferred from the gases to the water.
The common kind of boiler used in ships and power stations is the water-tube type, in which the water circulates in tubes surrounded by the hot furnace gases. The water-tube boilers at power stations produce steam at a pressure of up to 300 atmospheres and at a temperature of up to 600şC/1,100şF to feed to the steam turbines. It is more efficient than the fire-tube type that is used in steam locomotives. In this boiler the hot furnace gases are drawn through tubes surrounded by water.
Large metal container in which coal or charcoal is burned; warms people who must stay outside for long times; SYN. brasier.
ETYM Old Eng. caldron, caudron, caudroun, Old Fren. caudron, chauderon, French chaudron, an aug. of French chaudičre, Late Lat. caldaria, from Latin caldarius suitable for warming, from caldus, calidus, warm. Related to Chaldron, Calaric, Caudle.
A very large pot; SYN. cauldron.
1. A large kettle or boiler
2. Something resembling a boiling cauldron in intensity or degree of agitation
ETYM Old Fren. chaldron, French chaudron kettle. The same word as caldron.
A British imperial capacity measure (liquid or dry) equal to 36 bushels.
Old unit of dry volume equal to between 32 and 72 bushels.
Sinonimi: Cu | atomic number 29 | copper color
ETYM Old Eng. coper, Late Lat. cuper, from Latin cuprum for earlier Cyprium, Cyprium aes, i.e., Cyprian brass. Related to Cypreous.
Orange-pink, very malleable and ductile, metallic element, symbol Cu (from Latin cuprum), atomic number 29, atomic weight 63.546. It is used for its durability, pliability, high thermal and electrical conductivity, and resistance to corrosion.
It was the first metal used systematically for tools by humans; when mined and worked into utensils it formed the technological basis for the Copper Age in prehistory. When alloyed with tin it forms bronze, which strengthens the copper, allowing it to hold a sharp edge; the systematic production and use of this was the basis for the prehistoric Bronze Age. Brass, another hard copper alloy, includes zinc. The element’s name comes from the Greek for Cyprus (Kyprios), where copper was mined.1. A ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; SYN. Cu, atomic number 29.
2. A reddish brown the color of polished copper; SYN. copper color.
3. A copper penny.
4. Any of various small butterflies of the family Lycaenidae having copper colored wings.
ETYM Old Eng. ketel.
1. A large hemispherical brass or copper drum with a drumhead that can be tuned by adjusting the tension on it; SYN. kettledrum, tympanum, tympani, timpani.
2. A metal pot for stewing or boiling; usually has a lid; SYN. boiler.
3. The quantity a kettle will hold; SYN. kettleful.
Glacial geologic feature, formed when a block of stagnant ice from a receding glacier becomes isolated and buried in glacial outwash or drift before it finally melts. When the block disappears, it leaves a pit or depression called a kettle, in the drift. These depressions range from 15 ft/5 m to 8 mi/13 km in diameter, and some exceed 100 ft/33 m in depth.
As time passes, water sometimes fills the kettles to form lakes or swamps, features found throughout much of N North America. Lake Ronkonkoma, the largest lake on Long Island, New York, is an example.