/ Dictionary / Index N nycto-: Meaning and Definition of Find definitions for: nycto- Pronunciation: [key] var. of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nyctitropic nyctophobia Related Content Daily Word Quiz: intrepid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language