| an officer, acting under the officer of the day, who is responsible for the instruction, discipline, and performance of duty of the guard in a post, camp, or station. Abbreviation: OG, O.G. |
[oh-jee, oh-jee] 
| 1. | a double curve, resembling the letter S, formed by the union of a concave and a convex line. |
| 2. | Also called gula. Architecture. a molding with such a curve for a profile; cyma. Abbreviation: O.G., o.g. |
