Dictionary.net

• Any process in which advantage is taken of the fact that prepared bitumen is rendered insoluble by exposure to light, as in photolithography.

2010 - New Age Dictionary Database
By Oddity Software

• Any process in which advantage is taken of the fact that prepared bitumen is rendered insoluble by exposure to light, as in photolithography.

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