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From Biology-Online Dictionary | Biology-Online Dictionary
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1. A crossbeam; a lay of joists.

2. A wooden frame to confine an unruly horse or ox while shoeing. She sprung as a colt doth in the trave. (Chaucer)

Origin: Through French, fr. L. Trabs, trabis, a beam; cf. OF. Tref a beam, also F. Travail a frame to confine a horse, OE. Trave, trevys, travise, It. Travaglio, F. Travee the space between two beams.