1. The elementary stages of any subject (usually plural).
4. A proportion multiplied by 100.
7. Having any of numerous bright or strong colors reminiscent of the color of blood or cherries or tomatoes or rubies.
11. Towards the side away from the wind.
12. 10 hao equal 1 dong.
13. A city in northern India.
14. 4-wheeled motor vehicle.
15. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
17. A river in north central Switzerland that runs northeast into the Rhine.
18. A public promotion of some product or service.
20. (of complexion) Blemished by imperfections of the skin.
24. A machine-readable version of a standard dictionary.
25. A detailed description of design criteria for a piece of work.
27. A metrical unit with unstressed-stressed syllables.
28. Small European freshwater fish with a slender bluish-green body.
29. A fraudulent business scheme.
31. 1/10 gram.
32. The hair growing on the lower part of a man's face.
36. A small pellet fired from an air rifle or BB gun.
39. A woman hired to suckle a child of someone else.
40. An associate degree in applied science.
45. A vinyl polymer used especially in paints or adhesives.
46. A loose sleeveless outer garment made from aba cloth.
47. Of or relating to or characteristic of the Republic of Chad or its people or language.
48. The basic unit of money in Bulgaria.
49. Resinlike substance secreted by certain lac insects.
50. (Babylonian) God of storms and wind.
51. A period marked by distinctive character or reckoned from a fixed point or event.

1. Type genus of the Alcidae comprising solely the razorbill.
2. A small ball with a hole through the middle.
3. An emotional response that has been acquired by conditioning.
4. Type genus of the Phocidae.
5. A tight-fitting headdress.
6. Having a toe or toes of a specified kind.
7. An intensely radioactive metallic element that occurs in minute amounts in uranium ores.
8. A landlocked republic in eastern Africa.
9. (Scotland) A slope or hillside.
10. A unit of length equal to 3 feet.
16. A rotating disk shaped to convert circular into linear motion.
19. Submit or yield to another's wish or opinion.
21. A Ukrainian peninsula between the Black Sea and the Sea of Azov.
22. (of champagne) Moderately dry.
23. A doctor's degree in dental surgery.
26. An informal term for a father.
30. The blood group whose red cells carry both the A and B antigens.
33. More than enough in size or scope or capacity.
34. Someone who rants and raves.
35. An Indian tree of the family Combretaceae that is a source of timber and gum.
37. A small cake leavened with yeast.
38. King of Saudi Arabia since 1982 (born in 1922).
41. An enclosed space.
42. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
43. The cry made by sheep.
44. A condition (mostly in boys) characterized by behavioral and learning disorders.