"Diecastation" is not a word. "Diecasting" is the correct form of the word, which is a process for making metal objects. The adjective is "diecast" or "die-cast": "a diecast model car". The process: 1. Metal is super-heated to liquid form: http://www.cosmile.org/gallery/images/Pouring%20molten%20metal%20into%20a%20mould.jpg 2. The molten (liquid; hot) metal is forced between two molds called "die": http://www.eaa.net/upl/4/default/img/Casting_schematic%20view%20high%20pressure.gif 3. The object is cooled and edged (rough edges filed down), then painted, stained or finished with other pieces: http://www.freshpromotions.com.au/products/die-cast-lapel-badges1.jpg http://www.decuisine.co.uk/images/html_product_pages/BK430/BK430.jpg http://www.qualitypedalcars.com/files/1743348/uploaded/Cobra%20Blue%20DC42700.jpg

Here's a dictionary definition for you for die casting: 1. the process of making a casting by forcing molten metal into a metallic mold, or die, under great pressure 2. a casting so made