/ Dictionary / Index P primary tissue: Meaning and Definition of Find definitions for: pri'mary tis"sue Pronunciation: [key] — Bot. Bot. any tissue resulting directly from differentiation of an apical meristem. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. primary syphilis primary type Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language