sliv ‧ er /ˈslɪvə $ -ər/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Origin: slive 'to cut off thinly' (11-19 centuries) , from Old English slifan ]
a small pointed or thin piece that has been cut or broken off something
sliver of
a sliver of glass
a sliver of cake