/ Dictionary / Index N nine plus two array: Meaning and Definition of Find definitions for: nine' plus" two' array" Pronunciation: [key] — Cell Biol. Cell Biol. the arrangement of microtubules in a flagellum or cilium, consisting of a ring of nine evenly spaced couplets surrounding two central singlets. Symbol: 9 + 2. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ninepins nine plus zero array 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