Define the word a bifilar"a bifilar" gcide "The Collaborative International Dictionary of English v.0.48"
Bifilar \Bi*fi"lar\, 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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