Wiktionary
una corda
adv. (context music English) In piano music, the notation indicating that the player depresses the soft pedal, altering, and reducing the volume of the sound. In many pianos, this results in the hammer striking one string rather than three.
Usage examples of "una corda".
Arrostii la carne esponendola al calore della fiamma appesa a una corda, come avevo visto fare tante volte in Inghilterra, piantando cioè.