| ACROSS
1. Essential oil or perfume obtained from flowers.
5. A radioactive element of the actinide series.
7. Edible starchy tuberous root of taro plants.
11. An amino acid that is found in the central nervous system.
12. Unknown god.
13. A collection of objects laid on top of each other.
14. A mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues.
16. A light strong brittle gray toxic bivalent metallic element.
17. The branch of computer science that deal with writing computer programs that can solve problems creatively.
18. The blood group whose red cells carry both the A and B antigens.
23. Tag the base runner to get him out.
25. The capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates.
27. A unit of dry measure used in Egypt.
28. Chief port of Yemen.
31. Melon having yellowish rind and whitish flesh.
36. Snarled or stalled in complete confusion.
38. Small terrestrial lizard of warm regions of the Old World.
40. A white metallic element that burns with a brilliant light.
41. A flat-bottomed volcanic crater that was formed by an explosion.
44. An adult male person (as opposed to a woman).
45. A loose sleeveless outer garment made from aba cloth.
47. A white linen liturgical vestment with sleeves.
49. General term for any insect or similar creeping or crawling invertebrate.
50. A rotating disk shaped to convert circular into linear motion.
51. The United Nations agency concerned with atomic energy.
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DOWN
1. A city in northern India.
2. A sock with a separation for the big toe.
3. The elementary stages of any subject (usually plural).
4. An intensely radioactive metallic element that occurs in minute amounts in uranium ores.
5. Jordan's port.
6. A compartment in front of a motor vehicle where driver sits.
7. 30 to 300 gigahertz.
8. A Mid-Atlantic state.
9. A Chadic language spoken south of Lake Chad.
10. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
15. King of Saudi Arabia since 1982 (born in 1922).
19. A nucleic acid consisting of large molecules shaped like a double helix.
20. A condition (mostly in boys) characterized by behavioral and learning disorders.
21. Any of several tall tropical palms native to southeastern Asia having egg-shaped nuts.
22. Valuable fiber plant of East Indies now widespread in cultivation.
24. Electrical conduction through a gas in an applied electric field.
26. A public promotion of some product or service.
29. A soft silvery metallic element of the alkali earth group.
30. A logarithmic unit of sound intensity.
32. Wood of a sumac.
33. A river in north central Switzerland that runs northeast into the Rhine.
34. Affect with wonder.
35. The capital and largest city of Yemen.
37. (Babylonian) God of wisdom and agriculture and patron of scribes and schools.
38. Date used in reckoning dates before the supposed year Christ was born.
39. Type genus of the Amiidae.
40. A loose sleeveless outer garment made from aba cloth.
42. A flat wing-shaped process or winglike part of an organism.
43. A defensive missile designed to shoot down incoming intercontinental ballistic missiles.
46. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
48. Of or relating to the stomach and intestines.
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