| ACROSS
1. A fatal disease of cattle that affects the central nervous system.
4. Piece of solid food for dipping in a liquid.
8. Hormone produced early in pregnancy by the placenta.
11. A drug combination found in some over-the-counter headache remedies (Aspirin and Phenacetin and Caffeine).
12. South American armadillo with three bands of bony plates.
13. A period marked by distinctive character or reckoned from a fixed point or event.
14. A police officer who investigates crimes.
15. A former agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States.
17. A radioactive element of the actinide series.
19. Primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves.
22. An informal term for a father.
28. A flat wing-shaped process or winglike part of an organism.
30. A river in north central Switzerland that runs northeast into the Rhine.
31. A logarithmic unit of sound intensity.
33. A workplace for the conduct of scientific research.
34. Before noon.
36. Harsh or corrosive in tone.
40. The capital and largest city of Yemen.
44. An independent agency of the United States government responsible for collecting and coordinating intelligence and counterintelligence activities abroad in the national interest.
45. (informal) Exceptionally good.
48. A logarithmic unit of sound intensity equal to 10 decibels.
49. An ugly evil-looking old woman.
50. Mentally or physically infirm with age.
51. A condition (mostly in boys) characterized by behavioral and learning disorders.
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DOWN
1. A Chadic language spoken south of Lake Chad.
2. A detailed description of design criteria for a piece of work.
3. (computer science) A coding system that incorporates extra parity bits in order to detect errors.
4. A river that rises in central Germany and flows north to join the Elbe River.
5. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
6. Large burrowing rodent of South and Central America.
7. A soft silver-white or yellowish metallic element of the alkali metal group.
8. Heal or recover.
9. A steep rugged rock or cliff.
10. Offering fun and gaiety.
16. A small cake leavened with yeast.
18. (Irish) Mother of the ancient Irish gods.
20. (Babylonian) God of storms and wind.
21. (pathology) An elevation of the skin filled with serous fluid.
23. A silvery ductile metallic element found primarily in bauxite.
24. Any of a number of fishes of the family Carangidae.
25. British informal term.
26. A state in midwestern United States.
27. A hard brittle blue-white multivalent metallic element.
29. American prizefighter who won the world heavyweight championship three times (born in 1942).
32. The cry made by sheep.
35. Type genus of the Majidae.
36. Being ten more than one hundred ninety.
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.
38. In bed.
39. With no effort to conceal.
41. Someone (especially a woman) who annoys people by constantly finding fault.
42. Title for a civil or military leader (especially in Turkey).
43. A loose sleeveless outer garment made from aba cloth.
44. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
46. An intensely radioactive metallic element that occurs in minute amounts in uranium ores.
47. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
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