Definition and synonyms of SOLE from the online English dictionary from Macmillan Publishers Limited.
DEA number. A DEA number (DEA Registration Number) is a number assigned to a health care provider (such as a medical practitioner, optometrist, pharmacist, dentist, or veterinarian) by the U.S. Drug Enforcement Administration allowing them to write prescriptions for controlled substances.
The DEA has a registration system in place which authorizes medical professionals, researchers and manufacturers access to  Schedule I  drugs, as well as Schedules 2, 3, 4 and 5. Authorized registrants apply for and, if granted, receive a  DEA number .