| ACROSS
1. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
5. A graphical record of electrical activity of the brain.
8. (computer science) A computer that is running software that allows users to leave messages and access information of general interest.
11. Amino acid that is formed in the liver and converted into dopamine in the brain.
12. The longer of the two telegraphic signals used in Morse code.
13. A watery solution of sugars, salts, and minerals that circulates through the vascular system of a plant.
14. A translucent mineral consisting of hydrated silica of variable color.
15. The organ of sight (`peeper' is an informal term for `eye').
16. A rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys.
17. The blood group whose red cells carry both the A and B antigens.
21. A radioactive element of the actinide series.
22. A soft silvery metallic element of the alkali earth group.
23. A colorless and odorless inert gas.
25. English theoretical physicist who applied relativity theory to quantum mechanics and predicted the existence of antimatter and the positron (1902-1984).
28. Filled with fear or apprehension.
31. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
32. A compartment in front of a motor vehicle where driver sits.
34. The cry made by sheep.
35. No longer having or seeming to have or expecting to have life.
38. A small pellet fired from an air rifle or BB gun.
43. The sense organ for hearing and equilibrium.
47. (astronomy) The angular distance of a celestial point measured westward along the celestial equator from the zenith crossing.
48. The 7th letter of the Greek alphabet.
49. Using speech rather than writing.
51. Having much flesh (especially fat).
52. A small cake leavened with yeast.
53. A loose sleeveless outer garment made from aba cloth.
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DOWN
1. Any property detected by the olfactory system.
2. The head of the Roman Catholic Church.
3. A federal agency established to coordinate programs aimed at reducing pollution and protecting the environment.
4. West Indian tree having racemes of fragrant white flowers and yielding a durable timber and resinous juice.
5. A doctor's degree in education.
6. (Akkadian) God of wisdom.
7. The dialect of Albanian spoken in northern Albania and Yugoslavia.
8. A fatal disease of cattle that affects the central nervous system.
9. Common Indian weaverbird.
10. A detailed description of design criteria for a piece of work.
18. An indehiscent fruit derived from a single ovary having one or many seeds within a fleshy wall or pericarp.
19. An Arabic speaking person who lives in Arabia or North Africa.
20. A river in north central Switzerland that runs northeast into the Rhine.
24. Spiritual leader of a Jewish congregation.
26. Being nine more than ninety.
27. A unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material.
29. A state in midwestern United States.
30. An official prosecutor for a judicial district.
33. A public promotion of some product or service.
36. Angular distance above the horizon (especially of a celestial object).
37. Sluggish tailless Australian arboreal marsupial with gray furry ears and coat.
39. A Chadic language spoken south of Lake Chad.
40. Someone who works (or provides workers) during a strike.
41. According to the Old Testament he was a pagan king of Israel and husband of Jezebel (9th century BC).
42. A Tibetan or Mongolian priest of Lamaism.
44. Any of various long-tailed rodents similar to but larger than a mouse.
45. A numbered compartment in a post office where mail is put to be called for.
46. A constellation in the southern hemisphere near Telescopium and Norma.
50. A white metallic element that burns with a brilliant light.
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