Definify.com

Webster 1913 Edition

Noun.

(Arch. & Engin.)

The timbers, etc., which form a truss, taken collectively.

Weale.

(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.

The act of a hawk, or other bird of prey, in seizing its quarry, and soaring with it into air.

[Obs.]

ppr.

Packing or binding closely.

trussing

trussing ‎(plural trussings)

(architecture, engineering) The timbers, etc., that form a truss.
(Can we find and add a quotation of Weale to this entry?)
The art of stiffening or bracing a set of timbers, etc., by putting in struts, ties, etc., until it has something of the character of a truss.
(obsolete) The act of a hawk or other bird of prey in seizing its quarry and soaring into the air with it.