Demonstrative (adjective)

Tending to demonstrate or prove something; serving as evidence or proof of something; clearly showing something.

Origin:

From the latin word "demonstrativus" meaning "pointing out, showing".

Examples:

1. He made a demonstrative gesture.
2. The evidence was demonstrative of his guilt.
3. The demonstration was demonstrative of the technology's capabilities.
4. The experiment was demonstrative of the theory.
5. The demonstration was demonstrative of the scientist's skill.