弓弦桥
弓弦式桥

Bowstring \Bow"string`\, n.
1. The string of a bow.

2. A string used by the Turks for strangling offenders.

{Bowstring bridge}, a bridge formed of an arch of timber or
iron, often braced, the thrust of which is resisted by a
tie forming a chord of the arch.

{Bowstring girder}, an arched beam strengthened by a tie
connecting its two ends.

{Bowstring hemp} (Bot.), the tenacious fiber of the
{Sanseviera Zeylanica}, growing in India and Africa, from
which bowstrings are made. --Balfour.