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sill |
Also found in: Dictionary/thesaurus, Legal, Acronyms, Wikipedia, Hutchinson | 0.07 sec. |
sillor sheetIn geology, a tabular igneous intrusion emplaced parallel to the bedding of the enclosing rock. Although they may have inclined orientations, nearly horizontal sills are most common. Sills may range from a few inches to hundreds of feet thick and up to hundreds of miles long. They include rock compositions of all types. sill 1. a shelf at the bottom of a window inside a room 2. a horizontal piece along the outside lower member of a window, that throws water clear of the wall below 3. the lower horizontal member of a window or door frame 4. a continuous horizontal member placed on top of a foundation wall in order to carry a timber framework 5. a flat usually horizontal mass of igneous rock, situated between two layers of older sedimentary rock, that was formed by an intrusion of magma sill [sil] (building construction) The lowest horizontal member of a framed partition or of a window or door frame. (civil engineering) A timber laid across the foot of a trench or a heading under the side truss. The horizontal overflow line of a dam spillway or other weir structure. A horizontal member on which a lift gate rests when closed. A low concrete or masonry dam in a small stream to retard bottom erosion. (control systems) A type of robot articulation that has three degrees of freedom. (geology) Submarine ridge in relatively shallow water that separates a partly closed basin from another basin or from an adjacent sea. A tabular igneous intrusion that is oriented parallel to the planar structure of surrounding rock. (mining engineering) A piece of wood laid across a drift to constitute a frame to support uprights of timber sets and to carry the track of the tramway. The floor of a gallery or passage in a mine. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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