Bifilar

Bi·fi·lar

Bifilar

a.
  1. Two-threaded; involving the use of two threads; as, bifilar suspension; a bifilar balance.

Phrases & Compounds

Bifilar micrometer
an instrument form measuring minute distances or angles by means of two very minute threads (usually spider lines), one of which, at least, is movable; -- more commonly called a filar micrometer.