Neginah; Neginoth

Boyd’s Bible Dictionary:

Singular of Neginoth
(Psa. 61, title).

Concise Bible Dictionary:

A word occurring in the heading of Psalm 4; Psalm 6; Psalm 54; Psalm 55; Psalm 61; Psalm 67; Psalm 76. It is supposed to signify in the plural “on stringed instruments,” as it is translated in Habakkuk 3:1919The Lord God is my strength, and he will make my feet like hinds' feet, and he will make me to walk upon mine high places. To the chief singer on my stringed instruments. (Habakkuk 3:19). Neginah, the singular, occurs only in Psalm 61.

Jackson’s Dictionary of Scripture Proper Names:

a harp-song