| ACROSS
1. The smallest multiple that is exactly divisible by every member of a set of numbers.
4. Harsh or corrosive in tone.
8. A workplace for the conduct of scientific research.
11. 30 to 300 gigahertz.
12. The villain in William Shakespeare's tragedy who tricked Othello into murdering his wife.
13. To make a mistake or be incorrect.
14. (Akkadian) God of wisdom.
16. The basic unit of money in Romania.
17. Aircraft landing in bad weather in which the pilot is talked down by ground control using precision approach radar.
18. The basic unit of money in Zambia.
20. A public promotion of some product or service.
22. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
23. A rare silvery (usually trivalent) metallic element.
24. A pale rose-colored variety of the ruby spinel.
27. Made agreeably cold (especially by ice).
28. A loose sleeveless outer garment made from aba cloth.
29. A compartment in front of a motor vehicle where driver sits.
34. A state in northwestern North America.
37. The blood group whose red cells carry both the A and B antigens.
38. A small cake leavened with yeast.
43. A peninsula between the Red Sea and the Persian Gulf.
47. A male human offspring.
48. A Chadic language spoken south of Lake Chad.
50. An American doctorate usually based on at least 3 years graduate study and a dissertation.
51. A graphical recording of the cardiac cycle produced by an electrocardiograph.
52. Type genus of the Alcidae comprising solely the razorbill.
53. A plant hormone promoting elongation of stems and roots.
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DOWN
1. Plant having a large slender white bulb and flat overlapping dark green leaves.
2. A wad of something chewable as tobacco.
3. 300 to 3000 kilohertz.
4. The branch of computer science that deal with writing computer programs that can solve problems creatively.
5. West Indian tree having racemes of fragrant white flowers and yielding a durable timber and resinous juice.
6. One of the five major classes of immunoglobulins.
7. The largest city of Cameroon.
8. A human limb.
9. Type genus of the family Arcidae.
10. (informal) Exceptionally good.
15. Any of a number of fishes of the family Carangidae.
19. Advanced in years.
21. An official prosecutor for a judicial district.
25. A poplar that is widely cultivated in the United States.
26. Someone who works (or provides workers) during a strike.
30. A radioactive element of the actinide series.
31. A soft silvery metallic element of the alkali earth group.
32. A unit of magnetomotive force equal to 0.7958 ampere-turns.
33. A metabolic acid found in yeast and liver cells.
35. A member of a North American Indian people of the Klamath river valley in northern California.
36. A light touch or stroke.
39. A vigorous blow.
40. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
41. A Loloish language.
42. A quantity of no importance.
44. An agency of the United Nations affiliated with the World Bank.
45. The cry made by sheep.
46. (computer science) A measure of how densely information is packed on a storage medium.
47. A white metallic element that burns with a brilliant light.
49. Date used in reckoning dates before the supposed year Christ was born.
50. A flat wing-shaped process or winglike part of an organism.
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