sinusoid sinuslike • sinusoidal · · · Info · Definitions · Synonyms · Characters · · sinusoid · · Text Latin · · Script 8 · · Length Definitions · · · (noun) tiny endothelium-lined passages for blood in the tissue of an organ. · · Noun Definition 1 (noun) the curve of y=sin x. Synonyms: sine curve. · · Noun Definition 2 Synonyms · · · sine curve · · Synonym 1 Characters · · d latin small letter d U+0064 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 u latin small letter u U+0075