1849-1850, John Weale, Rudimentary Dictionary of Terms used in Architecture, Building, and Engineering
Beds (Trussing) were beds which packed into chests , for travelling ; and , considering the frequent removals , these must have been the most convenient kind .
Source: wiktionary
Sable, a falcon or, his wings expanded, trussing a mallard argent, on a chief of the latter, a cross botoné[…]
Source: wiktionary
A hawk trussing.
Source: wiktionary
Examples of this will be found in the arms of Madden ["Sable, a hawk or, trussing a mallard proper, on a chief of the second a cross botonny gules"], and in the crests of Graham, Cawston, and Yerburgh.
Source: wiktionary