/ Dictionary / Index N Nicostratus: Meaning and Definition of Find definitions for: Ni•cos•tra•tus Pronunciation: (nī-kos'tru-tus), [key] — n. Class. Myth. a son of Menelaus and Helen who, with his illegitimate brother Megapenthes, expelled Helen from Sparta when Menelaus died. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Nicosia nicotiana Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language