1. (astronomy) A measure of time defined by Earth's orbital motion.
4. French revolutionary who was prominent in the early days of the French Revolution (1749-1791).
12. A watery solution of sugars, salts, and minerals that circulates through the vascular system of a plant.
15. An association of countries in the western hemisphere.
16. (informal) Excessive sentimentality.
17. A flat wing-shaped process or winglike part of an organism.
18. Silver-coated candy bead for decorating cakes.
20. Exactly vertical.
21. A coenzyme derived from the B vitamin nicotinic acid.
22. English theoretical physicist who applied relativity theory to quantum mechanics and predicted the existence of antimatter and the positron (1902-1984).
24. A grant made by a law court.
27. Botswanan statesman who was the first president of Botswana (1921-1980).
28. (usually followed by `to') Having the necessary means or skill or know-how or authority to do something.
31. The sign language used in the United States.
32. A bivalent and trivalent metallic element of the rare earth group.
34. An alloy of copper and zinc (and sometimes arsenic) used to imitate gold in cheap jewelry and for gilding.
36. The blood group whose red cells carry both the A and B antigens.
38. German physicist and chemist who formulated the third law of thermodynamics (1864-1941).
43. A state in northwestern United States on the Pacific.
44. A radioactive element of the actinide series.
46. Reproduce someone's behavior or looks.
48. Large Indian antelope.
51. 4-wheeled motor vehicle.
52. Any of various dark heavy viscid substances obtained as a residue.
53. An affirmative.
54. The bureau of the Treasury Department responsible for tax collections.
57. The address of a web page on the world wide web.
59. A rounded thickly curled hairdo.
61. A river in north central Switzerland that runs northeast into the Rhine.
62. Worthy of imitation.
64. The former capital and 2nd largest city of Brazil.
66. Of a leaf shape.
67. An elementary particle responsible for the forces in the atomic nucleus.
69. Type genus of the Alcidae comprising solely the razorbill.
73. Ruffed grouse.
75. The immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose.
77. A river in north central Switzerland that runs northeast into the Rhine.
78. A white crystalline double sulfate of aluminum.
79. A tricycle (usually propelled by pedalling).
81. An agency of the United Nations affiliated with the World Bank.
82. Acute ulceration of the mucous membranes of the mouth or genitals.
83. Dried bark of the cascara buckthorn used as a laxative.
84. A young woman making her debut into society.
1. Scottish chemist noted for his research into the structure of nucleic acids (born in 1907).
2. An Iranian language spoken in Afghanistan.
3. A male monarch or emperor (especially of Russia prior to 1917).
4. One thousandth of a second.
5. Water frozen in the solid state.
6. A blood group antigen possessed by Rh-positive people.
7. The dilated portion of a canal or duct especially of the semicircular canals of the ear.
8. Strong lightweight wood of the balsa tree used especially for floats.
9. A liquid solution that results from elution.
10. A unit of pressure.
11. A member of a Turkic people of Uzbekistan and neighboring areas.
12. The capital and largest city of Yemen.
13. Fear resulting from the awareness of danger.
14. A genus of Ploceidae.
19. A canvas or leather bag for carrying game (especially birds) killed by a hunter.
23. A widely distributed system of free and fixed macrophages derived from bone marrow.
25. Confused movement.
26. An enclosed space.
29. The absolute unit of pressure equal to one dyne per square centimeter.
30. A unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions.
33. Cause to lose one's nerve.
35. A mythical Greek hero of Homer's Iliad.
37. A bachelor's degree in science.
39. The basic monetary unit of most members of the European Union (introduced in 1999).
40. Italian chemist noted for work on polymers (1903-1979).
41. Support consisting of a place to rest the foot while ascending or descending a stairway.
42. The third canonical hour.
45. Remove offensive capability from.
47. The United Nations agency concerned with civil aviation.
49. Narcotic consisting of a tincture of opium or any preparation in which opium is the main ingredient.
50. A colorless and odorless inert gas.
55. Not fanciful or imaginative.
56. Large burrowing rodent of South and Central America.
58. Small genus of mediterranean shrubs.
60. United States comedian and film actor (1880-1946).
63. A convex molding having a cross section in the form of a quarter of a circle or of an ellipse.
65. (trademark) An alloy of iron and nickel having a low coefficient of thermal expansion.
68. Predatory black-and-white toothed whale with large dorsal fin.
70. Set down according to a plan.
71. (of a young animal) Abandoned by its mother and raised by hand.
72. An Arabic speaking person who lives in Arabia or North Africa.
74. A drug combination found in some over-the-counter headache remedies (Aspirin and Phenacetin and Caffeine).
76. A loose sleeveless outer garment made from aba cloth.
80. (Akkadian) God of wisdom.