dabber

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dab·ber

 (dăb′ər)
n.
A cushioned pad used by printers and engravers to apply ink.

dabber

(ˈdæbə)
n
1. (Printing, Lithography & Bookbinding) a pad used by printers for applying ink by hand
2. a felt-tip pen with a very broad writing point, used especially by bingo players to cancel numbers on their cards