[ ˌtreɪbɪ'eɪʃ(ə)n ]
■ noun the use of beams in architectural construction, rather than arches or vaulting.
Derivatives
trabeated 'treɪbɪətɪd adjective
Origin
C16 (denoting a horizontal beam): formed irregularly from L. trabs , trab- 'beam, timber' + -ation .