1. A unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure.
4. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
8. A condition (mostly in boys) characterized by behavioral and learning disorders.
11. A river in north central Switzerland that runs northeast into the Rhine.
12. (informal) Someone whose style is out of fashion.
13. The longer of the two telegraphic signals used in Morse code.
14. A short high tone produced as a signal or warning.
16. (British) A waterproof raincoat made of rubberized fabric.
17. A constellation in the southern hemisphere near Telescopium and Norma.
18. (botany) Of or relating to the axil.
19. United States baseball player and manager (1873-1934).
21. Large northern deer with enormous flattened antlers in the male.
24. A soft yellow malleable ductile (trivalent and univalent) metallic element.
25. The syllable naming the fourth (subdominant) note of the diatonic scale in solmization.
26. A burst of deep loud hearty laughter.
28. Resinlike substance secreted by certain lac insects.
30. A light touch or stroke.
32. A metrical unit with unstressed-stressed syllables.
33. Jordan's port.
35. The blood group whose red cells carry both the A and B antigens.
36. An informal term for a father.
37. The compass point that is one point east (clockwise) of due north.
41. (Islam) The man who leads prayers in a mosque.
44. Someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential).
47. In a competent capable manner.
48. A flat wing-shaped process or winglike part of an organism.
49. Goddess of criminal rashness and its punishment.
50. Plant with an elongated head of broad stalked leaves resembling celery.
51. A unit of length of thread or yarn.
52. A plant hormone promoting elongation of stems and roots.

1. A small cake leavened with yeast.
2. A unit of weight used in east Asia approximately equal to 1.3 ounces.
3. The chief solid component of mammalian urine.
4. A doctor's degree in optometry.
5. (Australian and New Zealand) A disparaging term for English immigrants to Australia or New Zealand.
6. Mild yellow Dutch cheese made in balls.
7. Of or relating to or near the coccyx.
8. The sixth month of the civil year.
9. A unit of elastance equal to the reciprocal of a farad.
10. An Indian tree of the family Combretaceae that is a source of timber and gum.
15. Manufactured in standard sizes to be shipped and assembled elsewhere.
20. Hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum.
22. Hungarian choreographer who developed Labanotation (1879-1958).
23. A unit of power equal to 1000 watts.
27. A federal agency established to regulate the release of new foods and health-related products.
29. A compartment in front of a motor vehicle where driver sits.
31. United States swimmer who in 1926 became the first woman to swim the English Channel (1903- ).
34. A Bantu language spoken by the Kamba people in Kenya.
38. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
39. A Chadic language spoken south of Lake Chad.
40. A particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography).
42. Any high mountain.
43. Type genus of the family Myacidae.
45. The cry made by sheep.
46. The Tibeto-Burman language spoken in the Dali region of Yunnan.
47. The airforce of Great Britain.