Roughly half of U.S wetlands are located along the Gulf Coast and serve as critical habitat for 75 percent of migratory waterfowl entering the country.
Etching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (relief) in the metal.In modern manufacturing, other chemicals may be used on other types of material.tching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (relief) in the metal.
Etching. Etching is the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio in the metal. As an intaglio method of printmaking, it is, along with engraving, the most important technique for old master prints, and remains in wide use today.rinceton's WordNet (1.00 / 1 vote) Rate this definition: etching (noun). an impression made from an etched plate. etching (noun). an etched plate made with the use of acid. engraving, etching (noun). making engraved or etched plates and printing designs from them.