Ductor \Duc"tor\, n. [L., fr. ducere to lead.]

1. One who leads. [Obs.]

--Sir T. Browne.

2. (Mach.) 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.

Source: Webster's Revised Unabridged Dictionary (1913)