Definition of "water-cooled" []

• Cooled by contact with circulating water. Gas-engine cylinders are frequently water-cooled. Main bearings and cross-head guides of marine, engines are usually water-cooled by having water circulated through holes in the metal which surrounds the bearing.

The Century Dictionary (Public Domain)

• "The way I remember the years is: first came the heavy water-cooled tripod mounted machine-gun (1917), then came the BAR (1918), then came the light air-cooled tripod mounted machine-gun (1919)."
• "Air rises from ground level after passing over an artificial pond and draws the water-cooled air through the house."
• "Specifications: Model C-six; engine six-cylinder in-line, water-cooled; bore 4 9/16 in., stroke 5-1/2 in., displacement 495 cu. in., 48 hp. Price new $4,500."