/ Dictionary / Index R reticle: Meaning and Definition of Find definitions for: ret•i•cle Pronunciation: (ret'i-kul), [key] — n. Optics. a network of fine lines, wires, or the like placed in the focus of the eyepiece of an optical instrument. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reticle (Thesaurus) reticent reticular Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language