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.
© Webster 1913.