say it: SPAHY-ruhl
spiral is a noun, verb and adjective meaning "a plane curve traced by a point circling about the center but at increasing distances from the center". It carries 10 recorded senses.
a plane curve traced by a point circling about the center but at increasing distances from the center
a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
a continuously accelerating change in the economy
ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center
flying downward in a helical path with a large radius
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for spiral come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.