music

[farishta]

the flat strip on a stringed instrument where the strings lie and where they can be shortened by pressure to produce higher notes.

[boobesque]

the fret board?

[Mortartube]

Just "a fret" I would imagine

[snapdharlich]

If the instrument has frets (the metal bars), such as a standard guitar then it's a fretboard.  If you are talking about a standard classical instrument such as a violin etc, then it's a fingerboard.