/ Dictionary / Index N nyctalgia: Meaning and Definition of Find definitions for: nyc•tal•gia Pronunciation: (nik-tal'ju, -jē-u), [key] — n. Pathol. night pain that occurs in the sleep. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nyctaginaceous nyctalopia Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language