/ Dictionary / Index S structural iron: Meaning and Definition of Find definitions for: struc'tural i'ron Pronunciation: [key] iron shaped for use in construction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. structural geology structuralism Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language