/ Dictionary / Index E equinoctial year: Meaning and Definition of Find definitions for: e'quinoc'tial year' Pronunciation: [key] year (def. 4b). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. equinoctial storm equinox Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language