1. A licensed medical practitioner.
4. A master's degree in education.
7. A former communist country in eastern Europe and northern Asia.
11. A United Nations agency to promote trade by increasing the exchange stability of the major currencies.
12. A period marked by distinctive character or reckoned from a fixed point or event.
13. Large burrowing rodent of South and Central America.
14. An intensely radioactive metallic element that occurs in minute amounts in uranium ores.
16. A decree that prohibits something.
17. Having the leading position or higher score in a contest.
20. Tropical American tree producing cacao beans.
21. A unit of length of thread or yarn.
23. Used by southerners for an inhabitant of a northern state in the United States (especially a Union soldier).
27. A software system that facilitates the creation and maintenance and use of an electronic database.
30. An ancient upright stone slab bearing markings.
31. A plant hormone promoting elongation of stems and roots.
32. The capital and largest city of Yemen.
36. A state in southeastern United States.
39. A constellation in the southern hemisphere near Telescopium and Norma.
40. (informal) Exceptionally good.
44. Light informal conversation for social occasions.
45. The sense organ for hearing and equilibrium.
47. A Kwa language spoken by the Yoruba people in southwestern Nigeria.
48. A usually soluble substance for staining or coloring e.g. fabrics or hair.
49. Divulge information or secrets.

1. English theoretical physicist who applied relativity theory to quantum mechanics and predicted the existence of antimatter and the positron (1902-1984).
2. A member of the Siouan people formerly living in the Missouri river valley in NE Nebraska.
3. A radioactive transuranic element.
4. A field where grass or alfalfa are grown to be made into hay.
5. Bulky grayish-brown eagle with a short wedge-shaped white tail.
6. In a mildly insane manner.
7. Being or moving higher in position or greater in some value.
8. A island in the Netherlands Antilles that is the top of an extinct volcano.
9. A fraudulent business scheme.
10. Type genus of the Ranidae.
15. The cry made by sheep.
18. Electronic warfare undertaken to insure effective friendly use of the electromagnetic spectrum in spite of the enemy's use of electronic warfare.
19. A histamine blocker and antacid (trade name Zantac) used to treat peptic ulcers and gastritis and esophageal reflux.
22. A change for the better.
24. Large brownish-green New Zealand parrot.
25. Angular distance above the horizon (especially of a celestial object).
26. (Akkadian) God of wisdom.
28. Relating to or characteristic of or occurring on the sea or ships.
29. Of or relating to the stomach and intestines.
33. Any of various strong liquors distilled from the fermented sap of toddy palms or from fermented molasses.
34. (Babylonian) God of wisdom and agriculture and patron of scribes and schools.
35. In bed.
36. A radioactive gaseous element formed by the disintegration of radium.
37. A small cake leavened with yeast.
38. According to the Old Testament he was a pagan king of Israel and husband of Jezebel (9th century BC).
41. A column of light (as from a beacon).
42. A unit of surface area equal to 100 square meters.
43. A metric unit of volume or capacity equal to 10 liters.
44. Before noon.
46. A logarithmic unit of sound intensity.