/ Dictionary / Index S seminal vesicle: Meaning and Definition of Find definitions for: sem'inal ves'icle Pronunciation: [key] — Anat. Anat. either of two small saclike glands, located on each side of the bladder in males, that add nutrient fluid to semen during ejaculation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. seminal principle seminar Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language