/ Dictionary / Index S sinusoidal projection: Meaning and Definition of Find definitions for: sinusoi'dal projec"tion Pronunciation: [key] — Cartog. Cartog. an equal-area projection in which parallels are straight lines spaced at regular intervals, the central meridian is a straight line one-half the length of the equator, and the other meridians are curves symmetrical to the central meridian. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sinusoidal Sinus Sabaeus Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language