BIFILAR a.
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…
BRIDGE n.
e built obliquely from bank to bank, as sometimes required in railway engineering. -- Suspension bridge. See under Suspension. -- Trestle bridge, a bridge formed of a series of short, simple girders resting on trestles. -- Tubular bridge, a bridge in the form of a hollow trunk or rectangular tube, with cellular wall…