sciences

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