/ Dictionary / Index D deltiology: Meaning and Definition of Find definitions for: del•ti•ol•o•gy Pronunciation: (del"tē-ol'u-jē), [key] — n. the hobby of collecting post cards. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. delta wing deltoid Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language