| WHO ORS | World Health Organization Oral Rehydration Solution osmolality 330; 세계보건기구 경구 수액 용액 |
|---|---|
| OR | a logical binary relation that is true if any argument is true, and false otherwise; [o]estrogen rec... |
| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
| ORT | object relations technique; operating room technician; oral rehydration therapy |