A type of knot used to secure a coiled rope.

plural of alpine coil

A high-pitched whining sound caused by vibrations of electrical components in a device.

plural of coil spring

Fitted or cushioned with coil springs.

A common type of mechanical spring in a form of a helix, manufactured in different styles and sizes for many different applications.

plural of Flemish coil

(nautical) A rope that has been arranged into a neat, flat spiral coil.

plural of pedestal coil

(mechanics, steam heating) in a radiator, a group of connected straight pipes arranged side by side and one above another