The Collaborative International Dictionary
Voiding knife
Voiding \Void"ing\, n.
The act of one who, or that which, voids.
--Bp. Hall.-
That which is voided; that which is ejected or evacuated; a remnant; a fragment. [R.]
--Rowe.Voiding knife, a knife used for gathering up fragments of food to put them into a voider.
Wiktionary
voiding knife
n. (context obsolete English) A knife used for gathering up fragments of food to put them into a voider.