Noun
pegbox (plural pegboxes)
(music, lutherie) The part of a violin or similar stringed instrument that holds the tuning pegs.
A string may be tuned down by pulling it above the fingerboard, or tuned up by pressing the part of the string in the pegbox. Source: Internet
The metal tuning machines are attached to the sides of the pegbox with metal screws. Source: Internet
The tuning pegs are simple pegs of hardwood, somewhat tapered, that are held in place by friction in holes drilled through the pegbox. Source: Internet
Tuning Scroll and pegbox, correctly strung The pitches of open strings on a violin. Source: Internet