| tough-pitch | <chemistry> The exact state or quality of texture and consistency of well reduced and refined copper. Copper so reduced; called also tough-cake. Source: Websters Dictionary (01 Mar 1998) |
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| liquid pitch | Obtained by the destructive distillation of the wood of Pinus palustris and other species of Pinus; used internally as an expectorant, and externally in the treatment of skin diseases. Synonym: liquid pitch. (05 Mar 2000) |