throat 1. In botanical terms, the open portion of a flower. 2. A groove cut or formed on the underside of the face of a wall to prevent water from flowing back along the underside to the face of the wall.

throttling In a piping system, a valve that can control the amount of flow through it.

through bolt A bolt that passes entirely through the materials it fastens together.

through stone A stone with ends flush on each side of a wall and having its longest dimension perpendicular to the wall.

throw 1. The distance between a light source and the area of illumination. 2. The amount a bolt may extend beyond the surface it binds.

thrum In plant identification and descriptions, the type of flower that has a relatively short style and long stamens. (Compare with pin.)

thrust The amount of force exerted by weight or momentum.

thrust block Anything that transfers water's energy within a pipe system to the earth rather than to a joint. This keeps gasketed and slip-pipe joints from coming apart under pressure. The most common material used for this purpose is concrete.

concrete thrust blocks

thumb In landscape construction and excavation work, a hydraulically operated attachment to an excavation bucket allowing the operator to grasp objects between them. They are commonly found on trackhoes, mini-excavators, and backhoes.

thumb latch A lift latch used to hold doors or gates closed.

thyrse An inflorescence with a long, narrow panicle consisting of a series of racemosely arranged small cymes similar to a lilac or horse chestnut. The main axis is racemose and the secondary axes are cymes.

tidelands Lands located between mean high tide and mean low tide.

tie 1. A piece that connects materials, walls, branches, pipes, etc. 2. In surveying, a connection from a point of known position to a point that is to be identified. 3. The action of connecting pipes together.

tier A row or a group of rows positioned one above the other.

tie-rod A rod in tension, used to bind structural members together.

tie wall 1. A wall built perpendicular to the rest of the wall to increase stability. 2. A railroad tie wall.

tige The shaft of a column extending from the base moldings to the capital.

tile A ceramic or other clay-like material formed into varying shapes and uses, such as pieces for piping or thin flat pieces for finishing a floor, wall, or roof surface (ceramic tile, roof tile, quarry tile, etc.). Tile may be glazed or unglazed and is used both indoors and outdoors.

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