tuning peg
nounUK /ˈtjuːnɪŋ pɛɡ/
US /ˈtuːnɪŋ pɛɡ/
A small knob you turn to make a guitar string tighter or looser so it sounds right.
She turned the tuning peg until the string sounded just right.
OTHER MEANINGS
2. A peg on a stringed instrument that holds and adjusts a string's tension.
The old violin had wooden tuning pegs instead of metal ones.
3. A small pin used to tighten or loosen a string on a musical instrument.
He replaced the broken tuning peg on his ukulele.
4. A device on the head of a stringed instrument for adjusting pitch.
Each tuning peg controls one string on the guitar.