cewka 用英语:

Coil means to wind around or gather into a circular form. An example of coil is for a snake to wrap itself around a tree.

Laura coiled her hair at the back of her head.

a coil of wire

When a coil is moved near to a wire with current flowing in it current flows in the coil as well.

When you go to the toilet and urinate, you clean your urethra from any bacteria.