What does "spiral spring" mean?

A spring consisting of a wire, coiled usually in a flat spiral or in a helix.

What is a synonym for "spiral spring"?

Common synonyms include: coils, hairspring, hairsprings, mainsprings, spirals.

noun

noun ·Rare ·Advanced level

Noun

1
A spring consisting of a wire, coiled usually in a flat spiral or in a helix.
"The seats have spiral springs, covered by rubberised hair and trimmed in artificial leather of green colour."
2
a spring that is wound like a spiral wordnet

"The seats have spiral springs, covered by rubberised hair and trimmed in artificial leather of green colour."