[1] : The Collaborative International Dictionary of English v.0.48

internal-combustion engine \internal-combustion engine\ in
   which the heat or pressure energy necessary to produce motion
   is developed in the engine cylinder, as by the explosion of a
   gas, and not in a separate chamber, as in a steam-engine
   boiler. the gas used may be a fixed gas, or one derived from
   alcohol, ether, gasoline petrol, naphtha, oil petroleum,
   etc. there are three main classes: 1 gas engines proper,
   using fixed gases, as coal, blast-furnace, or producer gas;
   2 engines using the vapor of a volatile fluid, as the
   typical gasoline petrol engine; 3 oil engines, using
   either an atomized spray or the vapor produced by heat of a
   comparatively heavy oil, as petroleum or kerosene. in all of
   these the gas is mixed with a definite amount of air, the
   charge is composed in the cylinder and is then exploded
   either by a flame of gas flame ignition -- now little used,
   by a hot tube tube ignition or the like, by an electric
   spark electric ignition, the usual method is gasoline
   engines, or by the heat of compression, as in the diesel
   engine. gas and oil engines are chiefly of the stationary
   type. gasoline engines are largely used for automobile
   vehicles, boats, etc. most internal-combustion engines use
   the otto four-stroke cycle, though many use the two-stroke
   cycle. they are almost universally trunk engines and
   single-acting. because of the intense heat produced by the
   frequent explosions, the cylinders must be cooled by a water
   jacket water-cooled or by air currents air cooled to give
   the maximum thermodynamic efficiency and to avoid excessive
   friction or seizing.
   webster 1913 suppl. internalise \internalise\ v.
   psychology
   same as internalize. mkchiefly brit.

   syn: internalize, interiorize, interiorise.
        wordnet 1.5

[2] : WordNet (r) 2.0

internal-combustion engine
     n : a heat engine in which combustion occurs inside the engine
         rather than in a separate furnace; heat expands a gas
         that either moves a piston or turns a gas turbine syn: ice
see also:
ice 

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Steam Engine, definition of term: Steam Engine
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Reaction Engine >> R Words
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Chemical Engine, definition of term: Chemical Engine
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