Across
- 3. illness
- 6. survey, study, analysis
- 7. anomaly, irregularity
- 9. cut thinly
- 11. watch, check
- 13. region in space with strong gravitational field
- 14. unit, nucleus
- 15. understand, realise
- 16. researcher
- 19. fabulous
- 20. nourrishment
- 21. measure, proportion
Down
- 1. removal of a piece of body tissue
- 2. fool, cheat
- 4. clean, disinfect
- 5. lesson, conference
- 8. discovery, progress
- 10. test, trial for scientific purpose
- 12. articles made of glass
- 15. prodigy, mental giant
- 17. species
- 18. expand