/ Dictionary / Index E equinoctial storm: Meaning and Definition of Find definitions for: e'quinoc'tial storm' Pronunciation: [key] a storm of violent winds and rain occurring at or near the time of an equinox and popularly, but erroneously, believed to be physically associated with it. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. equinoctial rains equinoctial year Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language