Tossing

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Tossing

(p. pr. & vb. n.) of Toss
(n.) The act of throwing upward; a rising and falling suddenly; a rolling and tumbling.
(n.) A process which consists in washing ores by violent agitation in water, in order to separate the lighter or earhy particles; -- called also tozing, and treloobing, in Cornwall.
(n.) A process for refining tin by dropping it through the air while melted.