| ACROSS
1. The 7th letter of the Greek alphabet.
4. Electronic warfare undertaken under direct control of an operational commander to locate sources of radiated electromagnetic energy for the purpose of immediate threat recognition.
7. An amino acid that is found in the central nervous system.
11. A slight amount or degree of difference.
12. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
13. Any of various strong liquors distilled from the fermented sap of toddy palms or from fermented molasses.
14. The compass point that is one point east (clockwise) of due north.
15. A column of light (as from a beacon).
16. A Chadic language spoken south of Lake Chad.
17. The branch of computer science that deal with writing computer programs that can solve problems creatively.
19. A decree that prohibits something.
20. A very poisonous metallic element that has three allotropic forms.
22. A white linen liturgical vestment with sleeves.
25. Relating to or characteristic of or occurring on the sea or ships.
27. Slightly open.
30. An accidental hole that allows something (fluid or light etc.) to enter or escape.
33. A white metallic element that burns with a brilliant light.
34. A federation of North American labor unions that merged with the Congress of Industrial Organizations in 1955.
36. A deep bow.
40. Electronic warfare undertaken to prevent or reduce an enemy's effective use of the electromagnetic spectrum.
43. An agency of the United Nations affiliated with the World Bank.
46. Fallow deer.
49. Type genus of the Anatidae.
50. (Old Testament) In Judeo-Christian mythology.
51. An official prosecutor for a judicial district.
52. Type genus of the Nepidae.
53. A rare silvery (usually trivalent) metallic element.
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DOWN
1. An inactive volcano in Sicily.
2. A sock with a separation for the big toe.
3. A sweetened beverage of diluted fruit juice.
4. (astronomy) The reappearance of a celestial body after an eclipse.
5. Someone who works (or provides workers) during a strike.
6. Small genus of delicate mossy bog plants having white or violet flowers.
7. An anxiety disorder characterized by chronic free-floating anxiety and such symptoms as tension or sweating or trembling of light-headedness or irritability etc that has lasted for more than six months.
8. An Arabic speaking person who lives in Arabia or North Africa.
9. A small cake leavened with yeast.
10. A Kwa language spoken in Ghana and the Ivory Coast.
18. Unknown god.
21. A state in midwestern United States.
23. A chronic inflammatory collagen disease affecting connective tissue (skin or joints).
24. A soft silvery metallic element of the alkali earth group.
26. Mild yellow Dutch cheese made in balls.
28. A radioactive element of the actinide series.
29. An intensely radioactive metallic element that occurs in minute amounts in uranium ores.
31. Large brownish-green New Zealand parrot.
32. A metric unit of volume or capacity equal to 100 liters.
35. The basic unit of money in Sierra Leone.
37. (Babylonian) God of storms and wind.
38. A Tibetan or Mongolian priest of Lamaism.
39. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
41. A sudden very loud noise.
42. An independent group of closely related Chadic languages spoken in the area between the Biu-Mandara and East Chadic languages.
44. A loose sleeveless outer garment made from aba cloth.
45. An adult male person (as opposed to a woman).
46. The blood group whose red cells carry both the A and B antigens.
47. Before noon.
48. A public promotion of some product or service.
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