maˈchine-head BrE AmE noun [countable]
a small button attached to the strings on an instrument such as a ↑ guitar that you turn in order to make the instrument play in tune
maˈchine-head BrE AmE noun [countable]
a small button attached to the strings on an instrument such as a ↑ guitar that you turn in order to make the instrument play in tune
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012