Fr.: lame séparatrice
A partially reflecting mirror which permits a part of the light beam to pass through and reflects the rest.
→ beam; splitter, from to split, from M.Du. splitten, from P.Gmc. *spl(e)it-, PIE *(s)plei- "to split, splice."
Fâqgar, from fâq "split, breach, division" + tâbé→ beam.