n. 正弦曲线, 窦状隙

[医] 窦状隙; 窦状的

Sinusoid \Si"nus*oid\, n. [Sinus + -oid.] (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}.