sino- I. combining form Usage: usually capitalized Etymology: French, from Late Latin Sinae — more at sinologue 1.: Chinese < Sinogram > 2.: Chinese and < Sino-American > < Sino-Japanese > — compare chino- I II. combining form orsinu- Etymology: New Latin sinus 1.: relating to the sinus and < sinorespiratory > 2.: relating to the sinus venosus and < sinuventricular >