| ACROSS
1. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
5. An official prosecutor for a judicial district.
7. A member of an extinct North American Indian people who lived in the Pit river valley in northern California.
11. An official language of the Republic of South Africa.
12. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
13. Toward the mouth or oral region.
14. A cruel wicked and inhuman person.
15. A silvery soft waxy metallic element of the alkali metal group.
16. Cook and make edible by putting in a hot oven.
17. The branch of engineering science that studies the uses of electricity and the equipment for power generation and distribution and the control of machines and communication.
18. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
20. A logarithmic unit of sound intensity.
21. (Akkadian) God of wisdom.
22. (Greek mythology) Goddess of the earth and mother of Cronus and the Titans in ancient mythology.
24. Rounded like an egg.
26. Liquid containing proteins and electrolytes including the liquid in blood plasma and interstitial fluid.
28. Having undesirable or negative qualities.
29. A chronic inflammatory collagen disease affecting connective tissue (skin or joints).
31. The capital of Croatia.
34. A silvery ductile metallic element found primarily in bauxite.
35. A soft silvery metallic element of the alkali earth group.
36. Pertaining to or resembling amoebae.
40. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
44. (informal) Exceptionally good.
46. A bachelor's degree in naval science.
49. A spacecraft that carries astronauts from the command module to the surface of the moon and back.
50. Take in solid food.
51. (of a young animal) Abandoned by its mother and raised by hand.
52. Relating to or characteristic of or occurring on the sea or ships.
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DOWN
1. A member of the Siouan people inhabiting the valleys of the Platte and Missouri rivers in Nebraska.
2. Especially one side of a leaf.
3. The sense organ for hearing and equilibrium.
4. Large swift fly the female of which sucks blood of various animals.
5. Fairly small terrestrial ferns of tropical America.
6. Title for a civil or military leader (especially in Turkey).
7. A cruel and brutal fellow.
8. A constellation in the southern hemisphere near Telescopium and Norma.
9. Australian shrubs and small trees with evergreen usually spiny leaves and dense clusters of showy flowers.
10. Conforming to an ultimate standard of perfection or excellence.
19. An esoteric or occult matter that is traditionally secret.
23. An edge tool used to cut and shape wood.
25. A magnetic tape recorder for recording (and playing back) TV programs.
27. A ductile gray metallic element of the lanthanide series.
30. 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.
32. The blood group whose red cells carry both the A and B antigens.
33. An amino acid that is found in the central nervous system.
37. The template for protein synthesis.
38. Situated in or facing or moving toward the east.
39. (Babylonian) A goddess of the watery deep and daughter of Ea.
40. A rare silvery (usually trivalent) metallic element.
41. A bachelor's degree in library science.
42. Widely cultivated in tropical and subtropical regions for its fragrant flowers and colorful fruits.
43. A Tibetan or Mongolian priest of Lamaism.
45. A fatal disease of cattle that affects the central nervous system.
47. A radioactive element of the actinide series.
48. A public promotion of some product or service.
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