from the GNU version of the Collaborative International Dictionary of English
- n. a beam made of metal plates so as to have the form of a long box.
from The Century Dictionary and Cyclopedia
- n. A hollow beam having sides of plate-iron united by angle-irons.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a beam built up from boards; has a hollow rectangular cross section
Sorry, no etymologies found.