Weir (Weir)

1. A dam in a stream to raise the water level or direct its flow. 2. A notch in a levee, or other barrier, across or bordering a stream to regulate the flow of water (as in time of flood). 3. A device for determining the quantity of the depth of water over the crest, […]

Pig Iron (Pig I•ron)

1. Crude iron, the direct product of the blast furnace. Pig iron is either refined to produce steel, wrought iron, or ingot iron, or is remelted and cast into special shapes. 2. Another name for cast iron, the molten iron being run into molds called “pigs”.