Nehiloth \Ne"hi*loth\, n. pl. [Heb.] (Script.)
   A term supposed to mean, perforated wind instruments of
   music, as pipes or flutes. --Ps. v. (heading).
   [1913 Webster]

Nehiloth
   only in the title of Ps. 5. It is probably derived from a root
   meaning "to bore," "perforate," and hence denotes perforated
   wind instruments of all kinds. The psalm may be thus regarded as
   addressed to the conductor of the temple choir which played on
   flutes and such-like instruments.