If you watch a lot of true-crime TV or are a fan of shows like CSI:, then you’ve heard of DNA. (If you haven’t, you might want to read up on it.) The only reason I bring up DNA is because of its structure, which is that of a double helix.
So, what’s a helix? It’s a screw.
Seriously, if you were to unwind the threads of a screw, you’d find you had an inclined plane on your hands. The inclined plane is wrapped around the core of the screw, creating a helix.
A more common term for a helix is a spiral, as in “spiral notebook,” one in which the pages are held together by a wire spiral.
They call the spiral a “coil” in this case:
The Spiral Starecase [sic] was an American pop band that had one big hit, 1969’s “More Today Than Yesterday.”