"Element types" refers to the different categories or classifications of something, such as objects, components, or components of a system. It helps to group or categorize similar things. Full definition
There are four element types for the spells and four different spell categories. (gamespot.com)
designPH gives quick results using automatic analysis... The plugin provides an automatic analysis algorithm which can infer element types and area groups. (designph.org)
Each Z - CRYSTAL represents a different element type or Pokémon character in the video games. (toywiz.com)