Plasteel
From Warhammer 40k - Lexicanum
Plasteel is a type of advanced material used by the Imperium in the construction of many forms of armour. Heavy gauge plasteel is used in conjunction with ceramite to form the armour plating of Terminator Armour.1
The word plasteel is a portmanteau of plastic and steel. The term appears in Frank Herbert's Dune series and may have been coined by Harlan Ellison, who used it as early as 1956.
Source
- 1:Warhammer 40,000 Compendium, p. 11
