Bi*fi"lar (?), a. [Pref. bi- + filar.]

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

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.

 

© Webster 1913.

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