Identify the appropriate medical terms from their definitions. The first letter of the correct terms will, when put side-by-side, form the name of a common disease.

1. relating to the lumbar vertebrae and the sacrum
2. involuntary opening of the mouth
3. a septum between two parts of an organ or a cavity
4. one who is under treatment for a disease or behavioral disorder
5. protrusion of an anatomical structure from its normal position
6. inflammation of the matrix of the nail
7. the smallest unit of living structure capable of independent existence
8. a color occupying a position in the spectrum between green and orange
9. an end or ending
10. the formation of thoughts or ideas
11. resembling a cell
12. downy hair
13. the true characteristic or substance of a body
14. a projecting point of a surface
15. the study of motion, acceleration, or rate of change
16. an independent thing
17. contraction of the pupil of the eye
18. relating to or marked by jaundice
19. habitual psychological and physiologic dependence on a substance or practice that is beyond voluntary control