Sinusoid

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈsaɪnəˌsɔɪd/US:USA pronunciation: respellingUSA pronunciation: respelling(sī′nə soid′)


WordReference Random House Unabridged Dictionary of American English © 2026
si•nus•oid  (sī′nə soid′),USA pronunciation n. [Math.]
  1. Mathematicsa curve described by the equation y = a sin x, the ordinate being proportional to the sine of the abscissa.
  • sinus + -oid 1815–25

Collins Concise English Dictionary © HarperCollins Publishers::
sinusoid / ˈsaɪnəˌsɔɪd/
  1. any of the irregular terminal blood vessels that replace capillaries in certain organs, such as the liver, heart, spleen, and pancreas
  2. another name for sine curve
  1. resembling a sinus
Etymology: 19th Century: from French sinusoïde. See sinus, -oid
'Sinusoid' also found in these entries (note: many are not synonyms or translations):
sine curve - sinusoidal

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