1. A fatal disease of cattle that affects the central nervous system.
4. The cry made by sheep.
7. A master's degree in library science.
11. A drug combination found in some over-the-counter headache remedies (Aspirin and Phenacetin and Caffeine).
12. American prizefighter who won the world heavyweight championship three times (born in 1942).
13. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
14. A police officer who investigates crimes.
15. Surrealist Spanish painter (1904-1989).
16. A nucleic acid that transmits genetic information from DNA to the cytoplasm.
17. A radioactive element of the actinide series.
20. The blood group whose red cells carry both the A and B antigens.
21. An ugly evil-looking old woman.
25. Being one hundred more than three hundred.
26. A white metallic element that burns with a brilliant light.
27. Mar or spoil the appearance of.
32. A linguistic element added to a word to produce an inflected or derived form v 1.
33. (Scottish) Bluish-black or gray-blue.
35. An official prosecutor for a judicial district.
36. Lacking excess flesh.
37. A silvery soft waxy metallic element of the alkali metal group.
39. Extremely pleasing.
42. A graphical record of electric currents associated with muscle contractions.
45. A white soft metallic element that tarnishes readily.
46. The compass point midway between northeast and east.
47. Divisible by two.
49. (in golf) The standard number of strokes set for each hole on a golf course, or for the entire course.
50. A quantity of no importance.
51. A metric unit of volume or capacity equal to 10 liters.

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 member of an agricultural people of southern India.
5. (botany) Of or relating to the axil.
6. Aromatic bulb used as seasoning.
7. A polyvalent metallic element that resembles chromium and tungsten in its properties.
8. The month following March and preceding May.
9. A Russian river.
10. Someone who works (or provides workers) during a strike.
18. A city in western Germany near the Dutch and Belgian borders.
19. A port in western Israel on the Mediterranean.
22. A public promotion of some product or service.
23. No longer having or seeming to have or expecting to have life.
24. The airforce of Great Britain.
28. Being one more than one hundred.
29. (combining form) Former.
30. (South African) A camp defended by a circular formation of wagons.
31. A city in southwestern Switzerland at the western end of Lake Geneva.
34. Minute aquatic herbs floating on or below the water surface of still water consisting of a leaflike frond or plant body and single root.
35. (computer science) A coding system that incorporates extra parity bits in order to detect errors.
38. In bed.
40. Type genus of the Alcidae comprising solely the razorbill.
41. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
43. Range of what one can know or understand.
44. (Irish) Mother of the ancient Irish gods.
48. A ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group.