BIFILAR

bifilar

(adjective) having or using two filaments; “a bifilar suspension of a waving part of an instrument”

Source: WordNet® 3.1

Etymology

Adjective

bifilar (not comparable)

Having two wires, threads or filaments

Source: Wiktionary

Bi*fi"lar, a. Etym: [Pref. bi- + filar.]

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition