/ Dictionary / Index D dieb. secund.: Meaning and Definition of Find definitions for: dieb. secund. Pronunciation: [key] (in prescriptions) every second day. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dieb. alt. dieb. tert. 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