| ACROSS
1. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
5. Thickening of tissue in the motor tracts of the lateral columns and anterior horns of the spinal cord.
8. A Turkish unit of weight equal to about 2.75 pounds.
11. An independent group of closely related Chadic languages spoken in the area between the Biu-Mandara and East Chadic languages.
12. Resinlike substance secreted by certain lac insects.
13. A rotating disk shaped to convert circular into linear motion.
14. (archaic) Of persons.
15. Lower in esteem.
17. Plant with an elongated head of broad stalked leaves resembling celery.
19. The blood group whose red cells carry both the A and B antigens.
20. A Chadic language spoken south of Lake Chad.
22. Type genus of the Amiidae.
24. Cubes of meat marinated and cooked on a skewer usually with vegetables.
28. A river in north central Switzerland that runs northeast into the Rhine.
29. The elementary stages of any subject (usually plural).
30. The corporate executive responsible for the operations of the firm.
31. A legal document codifying the result of deliberations of a committee or society or legislative body.
33. (astronomy) The angular distance of a celestial point measured westward along the celestial equator from the zenith crossing.
35. A state in midwestern United States.
37. A former agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States.
39. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
43. Someone who works (or provides workers) during a strike.
45. The branch of computer science that deal with writing computer programs that can solve problems creatively.
47. Type genus of the Alcidae comprising solely the razorbill.
48. (archaic or Scottish) Faithful and true.
49. Having undesirable or negative qualities.
51. Strong liquor flavored with juniper berries.
52. Any of several related languages of the Celts in Ireland and Scotland.
53. Light informal conversation for social occasions.
54. A condition (mostly in boys) characterized by behavioral and learning disorders.
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DOWN
1. A strategically located monarchy on the southern and eastern coasts of the Arabian Peninsula.
2. Large burrowing rodent of South and Central America.
3. A program under which employees regularly accumulate shares and may ultimately assume control of the company.
4. West Indian tree having racemes of fragrant white flowers and yielding a durable timber and resinous juice.
5. A silvery ductile metallic element found primarily in bauxite.
6. A white soft metallic element that tarnishes readily.
7. Any of a number of fishes of the family Carangidae.
8. South American wood sorrel cultivated for its edible tubers.
9. A river of southwestern Africa that rises in central Angola and flows east and then north (forming part of the border between Angola and Congo) and continuing northwest through Congo to empty into the Congo River on the border between Congo and Republic of the Congo.
10. Naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion.
16. (informal) Exceptionally good.
18. The syllable naming the fourth (subdominant) note of the diatonic scale in solmization.
21. Make less active or intense.
23. (British) A waterproof raincoat made of rubberized fabric.
25. (Akkadian) God of wisdom.
26. An undergarment worn by women to support their breasts.
27. The residue that remains when something is burned.
32. A telegram sent abroad.
34. A loose sleeveless outer garment made from aba cloth.
36. Type genus of the Aceraceae.
37. Piece of solid food for dipping in a liquid.
38. 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.
40. Primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves.
41. Harsh or corrosive in tone.
42. Relating to or characteristic of or occurring on land.
44. An associate degree in applied science.
45. A workplace for the conduct of scientific research.
46. A plant hormone promoting elongation of stems and roots.
47. A public promotion of some product or service.
50. A logarithmic unit of sound intensity.
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