| upcast | 1. A cast; a throw. 2. <chemical> The ventilating shaft of a mine out of which the air passes after having circulated through the mine; distinguished from the downcast. Called also upcast pit, and upcast shaft. 3. An upset, as from a carriage. 4. A taunt; a reproach. Source: Websters Dictionary (01 Mar 1998) |
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| upcast | air passage consisting of a ventilation shaft through which air leaves a mine |
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