1. The part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands.
4. Of or relating to or characteristic of the Republic of Chad or its people or language.
8. A dark-skinned member of a race of people living in Australia when Europeans arrived.
11. Resinlike substance secreted by certain lac insects.
12. Characterized by lightness and insubstantiality.
13. A period of time spent sleeping.
14. Title for a civil or military leader (especially in Turkey).
15. A Tibetan or Mongolian priest of Lamaism.
16. Goddess of criminal rashness and its punishment.
17. A midnight meeting of witches to practice witchcraft and sorcery.
19. A monarchy in northwestern Europe occupying most of the British Isles.
21. A radioactive element of the actinide series.
22. The blood group whose red cells carry both the A and B antigens.
23. The compass point midway between south and southeast.
24. Capital and largest city of Iraq.
28. Type genus of the family Arcidae.
32. A communist state in the Caribbean on the island of Cuba.
33. (used as a combining form) Recent or new.
34. A river in north central Switzerland that runs northeast into the Rhine.
35. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
37. A small cake leavened with yeast.
45. A flat wing-shaped process or winglike part of an organism.
48. A loose sleeveless outer garment made from aba cloth.
49. A hospital unit staffed and equipped to provide intensive care.
50. A Loloish language.
51. Having leadership guidance.
52. Someone who is morally reprehensible.
53. An official language of the Republic of South Africa.
54. An agency of the United Nations affiliated with the World Bank.

1. By bad luck.
2. Kamarupan languages spoken in northeastern India and western Burma.
3. Someone who works (or provides workers) during a strike.
4. West Indian tree having racemes of fragrant white flowers and yielding a durable timber and resinous juice.
5. A form of energy that is transferred by a difference in temperature.
6. A human limb.
7. God of the sky.
8. (Irish) Mother of the ancient Irish gods.
9. A Chadic language spoken south of Lake Chad.
10. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
18. A member of an agricultural people of southern India.
20. Large brownish-green New Zealand parrot.
25. A soft yellow malleable ductile (trivalent and univalent) metallic element.
26. A unit of magnetomotive force equal to 0.7958 ampere-turns.
27. A nucleic acid consisting of large molecules shaped like a double helix.
29. An intensely radioactive metallic element that occurs in minute amounts in uranium ores.
30. A white metallic element that burns with a brilliant light.
31. A colorless and odorless inert gas.
36. A soft silvery metallic element of the alkali earth group.
38. Type genus of the Alcidae comprising solely the razorbill.
39. (computer science) A data transmission rate (bits/second) for modems.
40. Title for a civil or military leader (especially in Turkey).
41. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
42. Surrealist Spanish painter (1904-1989).
43. In bed.
44. A quantity of no importance.
46. Tastelessness by virtue of being cheap and vulgar.
47. A Turkish unit of weight equal to about 2.75 pounds.