| Draper's law | A chemical change is produced in a photochemical substance only by those light rays that are absorbed by that substance. (05 Mar 2000) |
|---|---|
| Draper, John | <person> English chemist, 1811-1882. See: Draper's law. (05 Mar 2000) |
| drapetomania | <psychiatry> An uncontrollable desire to run away from home. Origin: G. Drapetes, runaway, + mania, insanity (05 Mar 2000) |