1. South American wood sorrel cultivated for its edible tubers.
4. A Chadic language spoken south of Lake Chad.
8. An enclosed space.
11. An emotional response that has been acquired by conditioning.
12. An Arabic speaking person who lives in Arabia or North Africa.
13. The capital and largest city of Japan.
14. An independent agency of the United States government responsible for collecting and coordinating intelligence and counterintelligence activities abroad in the national interest.
15. Trees of chiefly South America.
17. The blood group whose red cells carry both the A and B antigens.
20. English monk and scholar (672-735).
21. A flat-bottomed volcanic crater that was formed by an explosion.
23. A particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography).
24. Something that hinders as if with bonds v 1.
25. One of the five major classes of immunoglobulins.
26. A software system that facilitates the creation and maintenance and use of an electronic database.
27. Type genus of the Alcidae comprising solely the razorbill.
31. A city in western Germany near the Dutch and Belgian borders.
35. A member of a Caddo people formerly living in north central Texas.
40. A genus of Mustelidae.
41. A loose sleeveless outer garment made from aba cloth.
42. An amino acid that is found in the central nervous system.
45. Being two more than fifty.
46. A machine-readable version of a standard dictionary.
47. Heal or recover.
48. Fiddler crabs.
49. A sweetened beverage of diluted fruit juice.
50. A river in north central Switzerland that runs northeast into the Rhine.
51. (informal) Roused to anger.
1. English scholastic philosopher and assumed author of Occam's Razor (1285-1349).
2. Tropical American trees with palmately compound leaves and showy bell-shaped flowers.
3. A constellation in the southern hemisphere near Telescopium and Norma.
4. The longer of the two telegraphic signals used in Morse code.
5. A colorless and odorless inert gas.
6. An imaginary elephant that appears in a series of French books for children.
7. A dark-skinned member of a race of people living in Australia when Europeans arrived.
8. The compass point that is one point east of southeast.
9. (Babylonian) God of storms and wind.
10. The ball-and-socket joint between the head of the femur and the acetabulum.
16. A master's degree in business.
18. British physicist (born in Austria) who with Lise Meitner recognized that Otto Hahn had produced a new kind of nuclear reaction which they named nuclear fission.
19. An informal term for a father.
22. A defensive missile designed to shoot down incoming intercontinental ballistic missiles.
28. A white soft metallic element that tarnishes readily.
29. A white metallic element that burns with a brilliant light.
30. (informal) Of the highest quality.
32. (anatomy) A depression or fissure where vessels or nerves or ducts enter a bodily organ.
33. Any plant of the genus Erica.
34. Submerged aquatic plant having narrow leaves and small flowers.
36. A United Nations agency created to assist developing nations by loans guaranteed by member governments.
37. (of a young animal) Abandoned by its mother and raised by hand.
38. Title for a civil or military leader (especially in Turkey).
39. The United Nations agency concerned with atomic energy.
40. A loose sleeveless outer garment made from aba cloth.
43. A room or establishment where alcoholic drinks are served over a counter.
44. Fermented alcoholic beverage similar to but heavier than beer.