1. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
4. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
8. A knockout declared by the referee who judges one boxer unable to continue.
11. A river in north central Switzerland that runs northeast into the Rhine.
12. A small cake leavened with yeast.
13. Lap that forms a cloth border doubled back and stitched down v 1.
14. (computer science) A standardized language for the descriptive markup of documents.
15. An inflammatory complication of leprosy that results in painful skin lesions on the arms and legs and face.
16. A soft silvery metallic element of the alkali earth group.
17. Seed of a pea plant.
18. A metric unit of volume equal to one tenth of a liter.
19. (Judaism) A Jewish festival (traditionally 8 days) celebrating the exodus of the Israelites from Egypt.
21. An official prosecutor for a judicial district.
23. A unit of length of thread or yarn.
25. A loose sleeveless outer garment made from aba cloth.
26. The second largest city in Tunisia.
27. Electrical conduction through a gas in an applied electric field.
28. Being one more than one.
30. Tropical woody herb with showy yellow flowers and flat pods.
32. A white metallic element that burns with a brilliant light.
33. The blood group whose red cells carry both the A and B antigens.
34. (Akkadian) God of wisdom.
38. Feline mammal usually having thick soft fur and being unable to roar.
40. Relating to or characteristic of or occurring on land.
45. A fluorocarbon with chlorine.
46. The lean flesh of a fish that is often farmed.
47. The 7th letter of the Greek alphabet.
48. A nucleotide derived from adenosine that occurs in muscle tissue.
49. United States writer (born in Poland) who wrote in Yiddish (1880-1957).
50. A metric unit of volume or capacity equal to 10 liters.
51. (Akkadian) God of wisdom.

1. A short labored intake of breath with the mouth open.
2. An enclosure made or wire or metal bars in which birds or animals are kept.
3. A large fleet.
4. A Russian river.
5. (Spanish) Saffron-flavored dish made of rice with shellfish and chicken.
6. The compass point that is one point north of due east.
7. A high-crowned black cap (usually made of felt or sheepskin) worn by men in Turkey and Iran and the Caucasus.
8. The fifth day of the week.
9. Cubes of meat marinated and cooked on a skewer usually with vegetables.
10. A member of the Siouan people formerly living in the Missouri river valley in NE Nebraska.
20. The capital and largest city of Yemen.
22. (botany) Relating to or attached to the axis.
24. (used as a sentenced connector) Therefore or consequently.
29. A federal agency that supervises carriers that transport goods and people between states.
31. At or near or toward the stern of a ship or tail of an airplane.
32. A human limb.
35. Type genus of the Alcidae comprising solely the razorbill.
36. A Chadic language spoken south of Lake Chad.
37. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
39. A protocol developed for the internet to get data from one network device to another.
41. An associate degree in applied science.
42. Government agency created in 1974 to license and regulate nuclear power plants.
43. A doctor's degree in preventive medicine.
44. A piece of furniture that provides a place to sleep.