1. Gull-like jaeger of northern seas.
5. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
8. A doctor's degree in dental surgery.
11. Any piece of work that is undertaken or attempted.
12. A metric unit of volume or capacity equal to 10 liters.
13. A period of time spent sleeping.
14. The part of the eye that contains the iris and ciliary body and choroid.
15. A wooden pin pushed or driven into a surface.
16. A sweetened beverage of diluted fruit juice.
17. Found along western Atlantic coast.
19. An enclosed space.
21. A radioactive element of the actinide series.
22. Type genus of the Amiidae.
24. The blood group whose red cells carry both the A and B antigens.
26. (computer science) A computer that is running software that allows users to leave messages and access information of general interest.
29. A river in north central Switzerland that runs northeast into the Rhine.
30. Austrian physicist and philosopher who introduced the Mach number and who founded logical positivism (1838-1916).
33. A city in east central Texas.
36. United States liquid unit equal to 4 quarts or 3.785 liters.
37. A small cake leavened with yeast.
43. A loose sleeveless outer garment made from aba cloth.
47. A serve that strikes the net before falling into the receiver's court.
48. A Loloish language.
49. Type genus of the family Myacidae.
50. An agency of the United Nations affiliated with the World Bank.
51. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
52. An association of countries in the western hemisphere.

1. A short piece remaining on a trunk or stem where a branch is lost.
2. (Polynesian) An alcoholic drink made from the aromatic roots of the kava shrub.
3. A person who makes use of a thing.
4. Jordan's port.
5. Measure of the US economy adopted in 1991.
6. Conqueror of Gaul and master of Italy (100-44 BC).
7. Primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves.
8. A nucleic acid consisting of large molecules shaped like a double helix.
9. An informal term for a father.
10. A detailed description of design criteria for a piece of work.
18. A benevolent aspect of Devi.
20. (Arthurian legend) The battlefield where King Arthur was mortally wounded.
23. A metrical unit with unstressed-stressed syllables.
25. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
27. A soft silvery metallic element of the alkali earth group.
28. A white trivalent metallic element.
31. A metric unit of length equal to one hundredth of a meter.
32. A trivalent metallic element of the rare earth group.
34. South American wood sorrel cultivated for its edible tubers.
35. (of reproduction) Not involving the fusion of male and female gametes reproduction".
38. In bed.
39. A Chadic language spoken south of Lake Chad.
40. Something causes misery or death.
41. Common Indian weaverbird.
42. South African term for `boss'.
44. A United Nations agency to coordinate international health activities and to help governments improve health services.
45. An accidental happening.
46. The United Nations agency concerned with international maritime activities.
47. An official prosecutor for a judicial district.