/ Dictionary / Index S septal: Meaning and Definition of Find definitions for: sep•tal Pronunciation: (sep'tl), [key] — adj. Biol. of or pertaining to a septum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: septal (Thesaurus) septa septarium Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language