1. An amino acid that is found in the central nervous system.
5. The younger of two major political parties in the United States.
8. An enclosed space.
11. An accidental hole that allows something (fluid or light etc.) to enter or escape.
12. An accountant certified by the state.
13. Title for a civil or military leader (especially in Turkey).
14. A tiny or scarcely detectable amount.
15. A former agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States.
16. A coenzyme derived from the B vitamin nicotinic acid.
17. An associate degree in nursing.
18. Date used in reckoning dates before the supposed year Christ was born.
24. A flat wing-shaped process or winglike part of an organism.
26. A compartment in front of a motor vehicle where driver sits.
30. An official language of the Republic of South Africa.
32. 1/10 gram.
34. The branch of computer science that deal with writing computer programs that can solve problems creatively.
36. A soft silvery metallic element of the alkali earth group.
37. Covered with paving material.
41. A Hindu prince or king in India.
45. A particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography).
46. A defensive missile designed to shoot down incoming intercontinental ballistic missiles.
49. A local computer network for communication between computers.
50. Fiddler crabs.
52. A sudden loss of consciousness resulting when the rupture or occlusion of a blood vessel leads to oxygen lack in the brain.
53. A doctor's degree in theology.
54. Large sweet juicy hybrid between tangerine and grapefruit having a thick wrinkled skin.
55. An associate degree in applied science.

1. Sustentacular tissue that surrounds and supports neurons in the central nervous system.
2. (in Gnosticism) A divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe.
3. Nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate.
4. Jordan's port.
5. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
6. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
7. Committee formed by a special-interest group to raise money for their favorite political candidates.
8. The capital and largest city of Yemen.
9. Any culture medium that uses agar as the gelling agent.
10. (of a young animal) Abandoned by its mother and raised by hand.
19. A white metallic element that burns with a brilliant light.
20. A small pellet fired from an air rifle or BB gun.
21. The cry made by sheep.
22. A digital display that uses liquid crystal cells that change reflectivity in an applied electric field.
23. The blood group whose red cells carry both the A and B antigens.
25. A white soft metallic element that tarnishes readily.
27. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
28. A radioactive element of the actinide series.
29. An official prosecutor for a judicial district.
31. A Tibetan or Mongolian priest of Lamaism.
33. A river in north central Switzerland that runs northeast into the Rhine.
35. A state in midwestern United States.
38. (of persons) Highest in rank or authority or office.
39. Having been read.
40. Open-heart surgery in which the rib cage is opened and a section of a blood vessel is grafted from the aorta to the coronary artery to bypass the blocked section of the coronary artery and improve the blood supply to the heart.
42. Type genus of the Alcidae comprising solely the razorbill.
43. An island in Indonesia south of Borneo.
44. Type genus of the Anatidae.
47. Any of various units of capacity.
48. Japanese ornamental tree with fragrant white or pink blossoms and small yellow fruits.
51. A soft yellow malleable ductile (trivalent and univalent) metallic element.