1Printing. A process by which an image is photographically transferred to a printing plate, and then etched, as in photoengraving, photogravure, and photolithography; a plate or print made in this way.

2Manufacturing Technology and Electronics. A manufacturing technique in which a surface is coated with a photoresist and then illuminated through a mask bearing the desired pattern and selectively etched, used for making finely detailed objects such as printed circuits and microtools.