1. East Indian tree bearing a profusion of intense vermilion velvet-textured blooms and yielding a yellow dye.
4. A quantity of no importance.
8. A doctor's degree in dental medicine.
11. Any of various coarse shrubby plants of the genus Iva with small greenish flowers.
12. Advanced in years.
13. A plant hormone promoting elongation of stems and roots.
14. Aromatic bulb used as seasoning.
15. No longer having or seeming to have or expecting to have life.
16. A unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material.
17. Plant with an elongated head of broad stalked leaves resembling celery.
20. A genus of tropical American plants have sword-shaped leaves and a fleshy compound fruits composed of the fruits of several flowers (such as pineapples).
24. A high-crowned black cap (usually made of felt or sheepskin) worn by men in Turkey and Iran and the Caucasus.
26. Angular distance above the horizon (especially of a celestial object).
27. A bachelor's degree in religion.
28. Someone who is not a clergyman or a professional person.
30. A heavy odorless colorless gas formed during respiration and by the decomposition of organic substances.
31. A coffee cake flavored with orange rind and raisins and almonds.
35. The blood group whose red cells carry both the A and B antigens.
37. An amino acid that is found in the central nervous system.
41. A former agency (from 1946 to 1974) that was responsible for research into atomic energy and its peacetime uses in the United States.
42. The airforce of Great Britain.
44. (Babylonian) God of wisdom and agriculture and patron of scribes and schools.
45. Counting the number of white and red blood cells and the number of platelets in 1 cubic millimeter of blood.
46. The 7th letter of the Greek alphabet.
47. Tag the base runner to get him out.
49. A river in north central Switzerland that runs northeast into the Rhine.
50. Fermented alcoholic beverage similar to but heavier than beer.
51. A small cake leavened with yeast.

1. English aristocrat who was the first wife of Prince Charles.
2. (zoology) Pertaining to or characteristic of birds.
3. A high-crowned black cap (usually made of felt or sheepskin) worn by men in Turkey and Iran and the Caucasus.
4. A coenzyme derived from the B vitamin nicotinic acid.
5. How long something has existed.
6. Lacking or deprive of the sense of hearing wholly or in part.
7. A condition (mostly in boys) characterized by behavioral and learning disorders.
8. English theoretical physicist who applied relativity theory to quantum mechanics and predicted the existence of antimatter and the positron (1902-1984).
9. A flat-bottomed volcanic crater that was formed by an explosion.
10. An informal term for a father.
18. (electronics) Of a circuit or device having an output that is proportional to the input.
19. Informal terms for a mother.
21. A flat wing-shaped process or winglike part of an organism.
22. A secret agent hired by a state to obtain (military) information about its enemies or by a business to obtain industrial secrets from competitors.
23. Someone who works (or provides workers) during a strike.
25. Before noon.
29. A silvery soft waxy metallic element of the alkali metal group.
32. An indehiscent fruit derived from a single ovary having one or many seeds within a fleshy wall or pericarp.
33. Cubes of meat marinated and cooked on a skewer usually with vegetables.
34. The capital and largest city of Ghana with a deep-water port.
36. A Chadic language spoken south of Lake Chad.
37. Any high mountain.
38. A former copper coin of Pakistan.
39. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
40. A French abbot.
41. A doctor's degree in religion.
43. At a great distance in time or space or degree.
48. A metallic element having four allotropic forms.
49. A radioactive element of the actinide series.