/ Dictionary / Index O optical center: Meaning and Definition of Find definitions for: op'tical cen'ter Pronunciation: [key] — Print. Print. a point about ten percent above the exact center of a printed page or layout. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. optical bench optical character recognition Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language