sinusoidal
adjective(si-nu-soi-dal)
of, relating to, shaped like, or varying according to a sine curve or sine wave
sinusoidal
noun(si-nu-soi-dal)
an equal-area map projection capable of showing the entire surface of the earth with all parallels as straight lines evenly spaced, the central meridian as one half the length of the equator, and all other meridians as curved lines