sinusoidal

[sahy-nuh-soid-l]
adjective
1.
Mathematics. of or pertaining to a sinusoid.
2.
having a magnitude that varies as the sine of an independent variable: a sinusoidal current.

Origin:
1875–80; sinusoid + -al1

sinusoidally, adverb
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World English Dictionary
sinusoidal (ˌsaɪnəˈsɔɪdəl)
 
adj
1.  maths of or relating to a sine curve
2.  physics having a magnitude that varies as a sine curve
 
sinus'oidally
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
It must have variable frequency sinusoidal and strength variability.
Square wave voltage waveforms begin to look more sinusoidal due to finite bandwidth.
Solar output is sinusoidal and covers much of peak demand.
But it seems that the sinusoidal pattern has gotten a much larger amplitude and a higher frequency.
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