The science and practice of melting and casting glass or metal.

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A historical speed measuring device consisting of a weighted wooden quadrant (quarter of a circle) attached to a bridle in such a manner that it will float in a vertical position, and a line with equally spaced knots, usually each 47 feet 3 inches apart. Speed is measured by casting the quadrant overboard and counting the number of knots paid out in a unit of time, usually 28 seconds.


1. Obscuring of a source of light by the intervention of an object. When the moon passes between the earth and the sun, casting a shadow on the earth, a solar eclipse takes place within the shadow. When the moo


Large casting attached to th after end of the keel, incorporating the rudder gudgeons and propeller post in single-screw ships


A large casting extending outboard from the main hull for supporting for the ends of the propeller shafts in a multi-screw ship


An artefact produced by pouring molten metal into a mould.


A pipe or casting in a vessel's hull through which the anchor cable runs.


A casting for distributing fuel and air supply to the intake ports of a petrol engine.


A hemispherical or triangular metal casting used on distillation-column trays to force upflowing vapors to bubble vacuum, holding gases, or covering objects. Also known as bell glass.


1. The process of binding together pulverized minerals, such as coal dust, into briquets under pressure, often with the aid of a binder, such as asphalt. 2. A process or method of mounting mineral ore, rock, or metal fragments in an embedding or casting material, such as natural or artificial resins, waxes, metals, or alloys, to facilitate handling during grinding, polishing, and microscopic examination.


A method for casting metals or forming thermoplastic resins in which the molten material solidifies in and conforms to the shape of the inner surface of a heated, rapidly rotating container.

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