sinusoid Meaning, Definition & Usage

  1. noun tiny endothelium-lined passages for blood in the tissue of an organ
  2. noun the curve of y=sin x
    sine curve.

WordNet

Si"nus*oid noun
Etymology
Sinus + -oid.
Definitions
  1. (Geom.) The curve whose ordinates are proportional to the sines of the abscissas, the equation of the curve being y = a sin x. It is also called the curve of sines. pref. sine curve

Webster 1913