Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A horizontal beam or bar held up by two pairs of divergent legs and used as a support.
  • n. A framework consisting of vertical, slanted supports and horizontal crosspieces supporting a bridge.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A horizontal member supported near each end by a pair of divergent legs, such as sawhorses.
  • n. A folding or fixed set of legs used to support a table-top or planks
  • n. A framework, using spreading, divergent pairs of legs used to support a bridge.
  • n. A trestle bridge

from the GNU version of the Collaborative International Dictionary of English

  • n. A movable frame or support for anything, as scaffolding, consisting of three or four legs secured to a top piece, and forming a sort of stool or horse, used by carpenters, masons, and other workmen; also, a kind of framework of strong posts or piles, and crossbeams, for supporting a bridge, the track of a railway, or the like.
  • n. The frame of a table.

from The Century Dictionary and Cyclopedia

  • n. A frame, consisting of a beam or bar fixed at each end to a pair of spreading legs, for use as a support.
  • n. Same as puncheon.
  • n. In heraldry, a low stool or bench used as a bearing: usually represented with three legs.
  • n. In civil engineering, a framework for supporting string-pieces, as of a railway, a bridge, or other elevated structure, composed of uprights with diagonal braces, and either with or without horizontal timbers below the stringers.
  • n. plural The shores or props of a ship under construction.
  • n. Same as trestletree.
  • n. In leather manufacturing, the sloping plank on which skins are laid while being curried.
  • n. An obsolete form of threshold.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a supporting tower used to support a bridge
  • n. sawhorses used in pairs to support a horizontal tabletop

Etymologies

Middle English trestel, from Old French, alteration of Vulgar Latin *trāstellum, trānstellum, diminutive of Latin trānstrum, beam; see transom.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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  • "In heraldry, a low stool or bench used as a bearing: usually represented with three legs." --Cent. Dict.

    June 20, 2012