1. A unit of electrical resistance equal to the resistance between two points on a conductor when a potential difference of one volt between them produces a current of one ampere.
4. Someone who works (or provides workers) during a strike.
8. A constellation in the southern hemisphere near Telescopium and Norma.
11. Seed of a pea plant.
12. A sensation (as of a cold breeze or bright light) that precedes the onset of certain disorders such as a migraine attack or epileptic seizure.
13. An ugly evil-looking old woman.
14. The sense organ for hearing and equilibrium.
15. Wife or mistress of Zeus and mother of Apollo and Artemis in ancient mythology.
16. The residue that remains when something is burned.
17. A fastener (as a buckle or hook) that is used to hold two things together.
19. A coffee cake flavored with orange rind and raisins and almonds.
21. Covered with paving material.
23. American novelist (1909-1955).
25. A port city in southwestern Iran.
29. A soft silvery metallic element of the alkali earth group.
30. The elementary stages of any subject (usually plural).
31. One of a set of small pieces of stiff paper marked in various ways and used for playing games or for telling fortunes.
32. American prizefighter who won the world heavyweight championship three times (born in 1942).
34. African mahogany trees.
38. American professional baseball player who hit more home runs than Babe Ruth (born in 1934).
42. A river in north central Switzerland that runs northeast into the Rhine.
43. A fraudulent business scheme.
46. A loose sleeveless outer garment made from aba cloth.
47. The use of nuclear magnetic resonance of protons to produce proton density images.
48. A member of the Shoshonean people of northeastern Arizona.
49. Payment due by the recipient on delivery.
50. A condition (mostly in boys) characterized by behavioral and learning disorders.
51. Long-bodied long-tailed tropical American wildcat.
52. Large brownish-green New Zealand parrot.

1. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
2. Heal or recover.
3. God of death.
4. Minute floating marine tunicate having a transparent body with an opening at each end.
5. An actor's line that immediately precedes and serves as a reminder for some action or speech.
6. The products of human creativity.
7. African tree having an exceedingly thick trunk and fruit that resembles a gourd and has an edible pulp called monkey bread.
8. According to the Old Testament he was a pagan king of Israel and husband of Jezebel (9th century BC).
9. Danish philologist whose work on Old Norse pioneered in the field of comparative linguistics (1787-1832).
10. Title for a civil or military leader (especially in Turkey).
18. Not subject to change or variation especially in behavior.
20. Any of various spiny trees or shrubs of the genus Acacia.
22. An independent group of closely related Chadic languages spoken in the area between the Biu-Mandara and East Chadic languages.
24. A rare silvery (usually trivalent) metallic element.
26. An official prosecutor for a judicial district.
27. A colorless and odorless inert gas.
28. A yellow trivalent metallic element of the rare earth group.
33. (folklore) A corpse that rises at night to drink the blood of the living.
35. Not easy.
36. Lacking sufficient water or rainfall.
37. United States tennis player who was the first Black to win United States and English singles championships (1943-1993).
39. Framework for holding objects.
40. A slender double-reed instrument.
41. A quantity of no importance.
44. Affectedly modest or shy especially in a playful or provocative way.
45. The month following March and preceding May.