adjective
heterogeneous
het-er-uh-JEE-nee-uhs/ˌhetərəˈdʒiːniəs/
Made up of parts that differ in kind or character.
The bowl holds a heterogeneous collection of pebbles, wooden cubes, marbles, and shells.

Etymology
The roots express “different kinds.” Applied to a mixture or collection, the word describes elements that differ in kind or nature rather than forming one uniform whole.
In context
psychology, like philosophy, is a remarkably heterogeneous field. So, sweeping verdicts on the discipline of psychology are unlikely to accurately reflect what different subfields are accomplishing
More examples
- The committee is a heterogeneous group of scientists, artists, and business owners.
- Granite is heterogeneous, containing several different minerals.
- The study draws on heterogeneous data, including interviews and medical records.
Forms
heterogeneous
heterogeneity noun — The state of containing different kinds of parts.