Complete Clue List
Across
1. Marie and Pierre?s element?
4. Optical concept, Airy ___ (British sp)
6. Study of life
8. Eye muscle
9. Eye condition
10. Drowned river valley
12. Naked seeds, botanically
14. Scottish river
15. Abbreviated American aeronautics organisation
17. A vector operator
18. Contains the testes
19. Sister chromatid pair
20. Star collection, Big ___
Down
1. Raising a number to the power of three
2. Wading bird
3. One-thousandth of a second
4. Poodles and Great Danes
5. 101001, Binary ___
6. Organic matter as fuel
7. Element represented by the symbol Y
10. A type of cell in the eye
11. Large primate
13. Bullion metal, Ag
15. A science geek?
16. Not a base
17. Cardiac valve flap