Singlestrung
Singlestrung refers to a musical instrument or a technique involving a single string. While many instruments utilize multiple strings, some are designed with or played using only one. Examples include the monochord, a historical instrument often used for acoustic experiments and meditation, and certain experimental or folk instruments where a single string is vibrated, often by bowing or plucking.
The concept of a single string can also extend to specific playing techniques on multi-stringed instruments.