1. in a way that relates to or involves the basic, fundamental, or essential nature of something
2. in a way that relates to the chemical elements or their properties
Usage: technical

Examples

• The two approaches are elementally different in their philosophy.
• Water is elementally composed of hydrogen and oxygen.
• The problem is elementally simple, though its solutions are complex.
• These materials are elementally distinct from one another.
• The argument is elementally flawed from the start.
• The compounds are elementally similar but structurally different.