reg. in English

Reg.

⇄

Reg.
1. Queen (Latin ?regina).
2. Regent.
3. Regiment.

reg.

⇄

reg.
an abbreviation for the following:
1. regent.
2. regiment.
3. region.
4. register.
5. registered.
6. registrar.
7. registry.
8a. regular.
b. regularly.
9. regulation.