Bible Dictionaries
Sinusoid

Webster's Dictionary

(n.) 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.

Bibliography Information
Webster, Noah. Entry for 'Sinusoid'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/sinusoid.html. 1828.