si·nu·soid /ˈsaɪnjəˌsɔɪd, ˈsaɪnə-/
  正弦曲線,竇狀隙,竇狀小管
  si·nu·soid /ˈsaɪn(j)əˌsɔɪd/ 名詞
  竇狀隙,竇狀的,正弦曲線,正弦式
  sinusoid
  正弦曲線
  sinusoid
  正弦曲線
  Si·nus·oid n.  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.
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  sinusoid
       n 1: tiny endothelium-lined passages for blood in the tissue of
            an organ
       2: the curve of y=sin x [syn: sine curve]