/ glɪˈsændəʊ; NAmE -doʊ/ noun
( pl. glis·san·dos , glis·sandi / -diː; NAmE /) (from Italian ) a way of playing a series of notes so that each one slides into the next, making a smooth continuous sound
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WORD ORIGIN
Italian , from French glissant , present participle of glisser to slip, slide.