1. A licensed medical practitioner.
4. A small cake leavened with yeast.
8. An enclosed space.
11. A federal agency established to coordinate programs aimed at reducing pollution and protecting the environment.
12. A city in northern India.
13. Title for a civil or military leader (especially in Turkey).
14. A logarithmic unit of sound intensity equal to 10 decibels.
15. Massive plantigrade carnivorous or omnivorous mammals with long shaggy coats and strong claws.
16. A coenzyme derived from the B vitamin nicotinic acid.
17. Sudden mass fear and anxiety over anticipated events.
20. A light strong brittle gray toxic bivalent metallic element.
23. Not subjected to an aging process.
25. A heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically).
28. A rare silvery (usually trivalent) metallic element.
30. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
31. Large burrowing rodent of South and Central America.
33. A public promotion of some product or service.
35. A radioactive element of the actinide series.
36. Any of various systems of units for measuring electricity and magnetism.
42. A nucleic acid consisting of large molecules shaped like a double helix.
44. The largest continent with 60% of the earth's population.
46. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
47. The last (12th) month of the year.
48. Not only so, but.
49. A barrier constructed to contain the flow or water or to keep out the sea.
50. A sweetened beverage of diluted fruit juice.
51. (Babylonian) God of storms and wind.
52. A loose sleeveless outer garment made from aba cloth.

1. United States labor organizer who ran for President as a socialist (1855-1926).
2. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
3. West Indian tree having racemes of fragrant white flowers and yielding a durable timber and resinous juice.
4. A very young child (birth to 1 year) who has not yet begun to walk or talk.
5. How long something has existed.
6. (informal) Exceptionally good.
7. A river in north central Switzerland that runs northeast into the Rhine.
8. The capital and largest city of Yemen.
9. Any culture medium that uses agar as the gelling agent.
10. (of a young animal) Abandoned by its mother and raised by hand.
18. Popular music originating in the West Indies.
19. Relating to or characteristic of a tribe.
21. A doctor's degree in religion.
22. The blood group whose red cells carry both the A and B antigens.
24. (Akkadian) God of wisdom.
26. A soft silvery metallic element of the alkali earth group.
27. 1/10 gram.
29. A heavy ductile magnetic metallic element.
32. (of complexion) Blemished by imperfections of the skin.
34. (Irish) Chief god of the Tuatha De Danann.
35. Title for a civil or military leader (especially in Turkey).
37. A member of an American Indian people of Yucatan and Belize and Guatemala who once had a culture characterized by outstanding architecture and pottery and astronomy.
38. Employed in accomplishing something.
39. King of Saudi Arabia since 1982 (born in 1922).
40. Someone who works (or provides workers) during a strike.
41. God of love and erotic desire.
43. (informal) Of the highest quality.
45. A plant hormone promoting elongation of stems and roots.