| Bifilar | a. [ Pref. bi- + filar. ] Two-threaded; involving the use of two threads; as, bifilar suspension; a bifilar balance. [ 1913 Webster ]
Bifilar micrometer (often called
a bifilar), 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. [ 1913 Webster ]
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| Unifilar | 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. [ 1913 Webster ]
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. [ 1913 Webster ]
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