Truss"ing (?), n.
1. Arch. & Engin.
The timbers, etc., which form a truss, taken collectively.
Weale.
2. Arch. & Engin.
The art of stiffening or bracing a set of timbers, or the like, by putting in struts, ties, etc., till it has something of the character of a truss.
3.
The act of a hawk, or other bird of prey, in seizing its quarry, and soaring with it into air.
[Obs.]
© Webster 1913.