Dictionary.net

• A lithographic drawing or painting material of the same nature as lithographic ink. It is also used as a resistant in the biting-in process.

2010 - New Age Dictionary Database
By Oddity Software

• A lithographic drawing or painting material of the same nature as lithographic ink. It is also used as a resistant in the biting-in process.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.