Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
splinter [ˈsplɪntər] n (of wood) ще́пка#; (of glass) оско́лок#; (in finger) зано́за
vi (bone, wood, glass etc) расщепля́ться (расщепи́ться*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.