/ Dictionary / Index N Nicoya Peninsula: Meaning and Definition of Find definitions for: Ni•co'ya Penin'sula Pronunciation: (ni-koi'u Sp. nē-kô'yä), [key] a peninsula in NW Costa Rica, on the Pacific Ocean. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nicotinize Nictheroy Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language