| ACROSS
1. A small island.
5. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
8. Thickening of tissue in the motor tracts of the lateral columns and anterior horns of the spinal cord.
11. South American armadillo with three bands of bony plates.
12. A workplace for the conduct of scientific research.
13. (British) A waterproof raincoat made of rubberized fabric.
14. A graphical record of electrical activity of the brain.
15. Cubes of meat marinated and cooked on a skewer usually with vegetables.
16. Informal terms for a mother.
17. A radioactive element of the actinide series.
18. (Akkadian) God of wisdom.
19. A sharp hand gesture (resembling a blow).
22. Resinlike substance secreted by certain lac insects.
24. A hollow device made of metal that makes a ringing sound when struck.
29. A short high tone produced as a signal or warning.
30. An Indian side dish of yogurt and chopped cucumbers and spices.
32. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
33. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
37. Open-heart surgery in which the rib cage is opened and a section of a blood vessel is grafted from the aorta to the coronary artery to bypass the blocked section of the coronary artery and improve the blood supply to the heart.
41. Large burrowing rodent of South and Central America.
44. A plant hormone promoting elongation of stems and roots.
45. The elementary stages of any subject (usually plural).
47. Small cubes with 1 to 6 spots on the faces.
48. Thigh of a hog (usually smoked).
49. An informal term for a father.
50. The 7th letter of the Greek alphabet.
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DOWN
1. The United Nations agency concerned with atomic energy.
2. A detailed description of design criteria for a piece of work.
3. The act of slowing down or falling behind.
4. A trivalent metallic element of the rare earth group.
5. Great merriment.
6. An esoteric or occult matter that is traditionally secret.
7. A loose sleeveless outer garment made from aba cloth.
8. Before noon.
9. A Tibetan or Mongolian priest of Lamaism.
10. Someone who works (or provides workers) during a strike.
20. A chronic skin disease occurring primarily in women between the ages of 20 and 40.
21. Wool of the alpaca.
23. A river in north central Switzerland that runs northeast into the Rhine.
25. The branch of engineering science that studies the uses of electricity and the equipment for power generation and distribution and the control of machines and communication.
26. A bachelor's degree in religion.
27. A highly unstable radioactive element (the heaviest of the halogen series).
28. A soft silvery metallic element of the alkali earth group.
31. A former agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States.
34. A metabolic acid found in yeast and liver cells.
35. Electronic warfare undertaken to insure effective friendly use of the electromagnetic spectrum in spite of the enemy's use of electronic warfare.
36. King of Saudi Arabia since 1982 (born in 1922).
37. A soft silvery metallic element of the alkali earth group.
38. An officer who acts as military assistant to a more senior officer.
39. Anything that serves as an enticement.
40. (Greek mythology) Goddess of the earth and mother of Cronus and the Titans in ancient mythology.
42. South American wood sorrel cultivated for its edible tubers.
43. Large brownish-green New Zealand parrot.
46. A public promotion of some product or service.
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