| ACROSS
1. A television system that has more than the usual number of lines per frame so its pictures show more detail.
5. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
8. The part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands.
11. A particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography).
12. An awkward stupid person.
13. The last (12th) month of the year.
14. An affirmative.
17. A soft silvery metallic element of the alkali earth group.
18. An official prosecutor for a judicial district.
20. Having a circular shape.
21. Agency of the United States government charged with mediating disputes between management and labor.
25. 35th President of the United States.
27. A port in southwestern Scotland.
29. A postulated biochemical change (presumably in neural tissue) that represents a memory.
32. Any of various trees of the genus Ulmus.
35. A village of huts for native Africans in southern Africa.
38. A state in midwestern United States.
39. (Akkadian) God of wisdom.
40. A light strong brittle gray toxic bivalent metallic element.
41. Included seven times in every 19 years.
44. The basic unit of electric current adopted under the System International d'Unites.
46. A city in northwestern Syria.
48. Black tropical American cuckoo.
49. A coenzyme derived from the B vitamin nicotinic acid.
50. A member of the Siouan people formerly living in the Missouri river valley in NE Nebraska.
51. The cry made by sheep.
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DOWN
1. Austrian composer who influenced the classical form of the symphony (1732-1809).
2. Depressing in character or appearance.
3. A beverage made by steeping tea leaves in water.
4. A state in the eastern United States.
5. A state of southwestern India.
6. A compartment in front of a motor vehicle where driver sits.
7. (old-fashioned) At or from or to a great distance.
8. A public promotion of some product or service.
9. The compass point that is one point north of northeast.
10. Any of a number of fishes of the family Carangidae.
15. A metallic element having four allotropic forms.
16. A blind god.
19. The elementary stages of any subject (usually plural).
22. Old World wild swine having a narrow body and prominent tusks from which most domestic swine come.
23. A human limb.
24. Small cubes with 1 to 6 spots on the faces.
26. Large brownish-green New Zealand parrot.
28. A name for the Old Testament God as transliterated from the Hebrew YHVH.
30. Tag the base runner to get him out.
31. An appearance of reflected light.
32. A state of southwestern India.
33. A woody climbing usually tropical plant.
34. A dark region of considerable extent on the surface of the moon.
36. Avatar of Vishnu.
37. A rare silvery (usually trivalent) metallic element.
42. A federal agency established to coordinate programs aimed at reducing pollution and protecting the environment.
43. A light touch or stroke.
45. A sliver-white metallic element of the platinum group that resembles platinum.
47. A white soft metallic element that tarnishes readily.
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