air-cooled 
adjective
(Especially of an engine) cooled by means of a current of air.The Americans were developing larger tanks, with cast-armour hulls and turrets, better guns, and air-cooled diesel engines....
- Sitting almost upright on one of its floats, only the severe damage to the front end, where its 14-cylinder, air-cooled radial engine was partially torn away on impact, betrays the violence that saw this aircraft downed.
- The Navy reasoned that air-cooled radial engines offered added reliability, especially when operating over water.
- cleaver
- Cleaver, Eldridge
- cleavers
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- clef
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- cleft lip
- cleft palate
- cleft sentence
- cleg
- Clegg, Nick
- Cleisthenes
- cleistogamous
- cleistogamy
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- clemency
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- Clemens, Samuel Langhorne
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- Clemente, Roberto
- clementine
- Clement of Alexandria, St
- Clement, St
- Clemson