ETCHED

verb

1. To cut into a surface with an acid or other corrosive substance in order to make a pattern. Best known as a technique for creating printing plates, but also used for decoration on metal, and, in modern industry, to make circuit boards.
2. To engrave a surface.
3. To make a lasting impression.

adjective

1. Cut or dug into the surface as by etching.
2. (of a muscle, body part or person) Toned and with a well-defined musculature.