1. Any of various trees of the genus Ulmus.
4. South African term for `boss'.
8. A dark-skinned member of a race of people living in Australia when Europeans arrived.
11. A doctor's degree in education.
12. Type genus of the Alcidae comprising solely the razorbill.
13. A period of time spent sleeping.
14. A barrier constructed to contain the flow or water or to keep out the sea.
15. German organist and contrapuntist (1685-1750).
16. Goddess of criminal rashness and its punishment.
17. Jordan's port.
19. Gear (including necessary machinery) for a particular enterprise.
21. A radioactive element of the actinide series.
23. A former agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States.
27. A light touch or stroke.
30. African tree having an exceedingly thick trunk and fruit that resembles a gourd and has an edible pulp called monkey bread.
32. A white metallic element that burns with a brilliant light.
34. An official prosecutor for a judicial district.
35. (Babylonian) The sky god.
36. Someone who works (or provides workers) during a strike.
44. Swift timid long-eared mammal larger than a rabbit having a divided upper lip and long hind legs.
46. Title for a civil or military leader (especially in Turkey).
47. The compass point that is one point north of due west.
49. Goddess of fate.
50. Gone by.
51. An official language of the Republic of South Africa.
52. The cry made by sheep.

1. Tropical starchy tuberous root.
2. An accidental hole that allows something (fluid or light etc.) to enter or escape.
3. Designer drug designed to have the effects of amphetamines (it floods the brain with serotonin) but to avoid the drug laws.
4. A small cake leavened with yeast.
5. A flat wing-shaped process or winglike part of an organism.
6. Grow by addition, as of capital.
7. Formerly a term of respect for important white Europeans in colonial India.
8. (Irish) Mother of the ancient Irish gods.
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.
18. A light strong brittle gray toxic bivalent metallic element.
20. A rare silvery (usually trivalent) metallic element.
22. An important seaport on the Island of Cebu in the Philippines.
24. (Akkadian) God of wisdom.
25. A heavy odorless colorless gas formed during respiration and by the decomposition of organic substances.
26. A decree that prohibits something.
28. A public promotion of some product or service.
29. A soft silvery metallic element of the alkali earth group.
31. A very young child (birth to 1 year) who has not yet begun to walk or talk.
33. A loose sleeveless outer garment made from aba cloth.
37. 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.
38. A river in central Italy rising in the Apennines and flowing through Florence and Pisa to the Ligurian Sea.
39. Title for a civil or military leader (especially in Turkey).
40. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
41. Material used to daub walls.
42. A city in northern India.
43. A quantity of no importance.
45. A plant hormone promoting elongation of stems and roots.
48. A unit of weight equivalent to 1000 kilograms.