\U`ni*fi"lar\, a. [Uni- + L. filum a thread.]
Having only one thread; involving the use of only one thread,
wire, fiber, or the like; as, unifilar suspension.
{Unifilar magnetometer} (Physics), an instrument which
   consists of a magnetic bar suspended at its center of
   gravity by a long thread, constituting a delicate means
   for accurately measuring magnetic intensities, also for
   determining declinations of the magnetic needle.