ductor

Duc"tor, n. Etym: [L., fr. ducere to lead.] 1. One who leads. [Obs.] Sir T. Browne. 2. (Mach.) Defn: A contrivance for removing superfluous ink or coloring matter from a roller. See Doctor, 4. Knight. Ductor roller (Printing), the roller which conveys or supplies ink to another roller. Knight.

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