What does Oro stand for?

Orotate - Biochemistry

Orotic Acid - Biochemistry

Oak Ridge Operations Office (MCD)

Office of Regional Operations - Environmental Protection Agency (GFGA)

Office of Regional Operations - Office of Field Operations - Department of Labor

Official Receiver's Office - Australia

Oil Red O - A stain

Operations Research Office

Orapouche - An arbovirus - Laboratory science (DAVI)

Orofino Resources Ltd. - Toronto Stock Exchange symbol - Vancouver Stock Exchange symbol

Orokolo - Language code (ETLW)

Oropa - Italy - Seismograph station code, US Geological Survey - Closed (SEIS)

Oropouche - An arbovirus

Orthicon Read-Out

Porto Seguro - Brazil - Airport symbol (AD)

Rockland Public Library, Ontario - Library symbol - National Library of Canada (NLC)