bar science definition
- A unit used to measure atmospheric pressure. It is equal to a force of 100,000 newtons per square meter of surface area, or 0.987 atmosphere.
- An elongated, offshore ridge of sand, gravel, or other unconsolidated sediment, formed by the action of waves or long-shore currents and submerged at least during high tide. Bars are especially common near the mouths of rivers or estuaries.
- A ridgelike mound of sand, gravel or silt formed within a stream, along its banks, or at its mouth. Bars form where the stream's current slows down, causing sediment to be deposited.
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