1. Light informal conversation for social occasions.
4. (computer science) A unit for measuring the execution speed of computers.
8. A light touch or stroke.
11. A dark-skinned member of a race of people living in Australia when Europeans arrived.
12. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
13. An agency of the United Nations affiliated with the World Bank.
14. An accidental hole that allows something (fluid or light etc.) to enter or escape.
16. Of or relating to or near the sacrum.
17. A silvery ductile metallic element found primarily in bauxite.
19. A condition (mostly in boys) characterized by behavioral and learning disorders.
20. The compass point that is one point east (clockwise) of due north.
22. The elementary stages of any subject (usually plural).
24. The southern part of the ancient Palestine succeeding the kingdom of Judah.
26. A soft silvery metallic element of the alkali earth group.
29. A master's degree in fine arts.
31. The blood group whose red cells carry both the A and B antigens.
32. A unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material.
34. A public promotion of some product or service.
36. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
41. A Chadic language spoken south of Lake Chad.
45. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
46. Type genus of the Amiidae.
47. The longer of the two telegraphic signals used in Morse code.
48. A barrier constructed to contain the flow or water or to keep out the sea.
49. An official language of the Republic of South Africa.
50. A doctor's degree in education.
51. A loose sleeveless outer garment made from aba cloth.

1. Offering fun and gaiety.
2. Norwegian mathematician (1802-1829).
3. A long thin fluffy scarf of feathers or fur.
4. A polyvalent metallic element that resembles chromium and tungsten in its properties.
5. The sciences concerned with gathering and manipulating and storing and retrieving and classifying recorded information.
6. The basic unit of money in Uruguay.
7. Scarabaeid beetle considered divine by ancient Egyptians.
8. English theoretical physicist who applied relativity theory to quantum mechanics and predicted the existence of antimatter and the positron (1902-1984).
9. (Babylonian) God of storms and wind.
10. With no effort to conceal.
15. Fiber from an East Indian plant Hibiscus cannabinus.
18. Large brownish-green New Zealand parrot.
21. The hair growing on the lower part of a man's face.
23. Obvious and dull.
25. A doctor's degree in dental medicine.
27. An official prosecutor for a judicial district.
28. A small pellet fired from an air rifle or BB gun.
30. A heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically).
33. Small terrestrial lizard of warm regions of the Old World.
34. A long thin fluffy scarf of feathers or fur.
35. (Irish) Chief god of the Tuatha De Danann.
37. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
38. King of Saudi Arabia since 1982 (born in 1922).
39. Someone who works (or provides workers) during a strike.
40. God of love and erotic desire.
42. Brief episode in which the brain gets insufficient blood supply.
43. A sweetened beverage of diluted fruit juice.
44. 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.
45. A constellation in the southern hemisphere near Telescopium and Norma.