Obs. [f. TARE sb.2 + -ER1.] An assay-officer of the stannaries, who ascertained the amount of dross or foreign matter in the tin.
1625. Laws Stanaries, ix. (1808), 20. If the tin be not found faulty to the value assessed by the tarer [etc.]. Ibid., x. If any man … hide worse matter than tin within his … blocks of tin, which the tarer by his outward essay with his chizel cannot come at.
