The Collaborative International Dictionary of English v.0.48:

neginoth \neg"i*noth\, n. pl. [Heb. n[e^]g[imac]n[=o]th.]
   (Script.)
   Stringed instruments. --Dr. W. Smith.
   [1913 Webster]

         To the chief musician on Neginoth.       --Ps. iv.
                                                  9heading).
   [1913 Webster]