1) Carburetor 2) Device in petrol engines 3) Mechanical device 1) Carburetor 
• (n.) One that carburets; specif., an apparatus in which air or gas is carbureted, as by passing it through a light petroleum oil. The carburetor for a gasoline engine is usually either a surface carburetor, or a float, float-feed, / spray, carburetor. In the former air is charged by being passed over the surface of gasoline. In the latter a ...
Device that mixes fuel and air into a combustible vapour.
A carburettor is a device for charging air with a hydrocarbon.