| OI | a filter that removes impurities from the oil used to lubricate an internal-combustion engine |
|---|---|
| OI | a furnace that burns oil |
| OI | petroleum bought or sold at an agreed price for delivery at a specified future date |
| OI | a specialist in petroleum geology |
| OI | a gland that secretes oil |
| OI | heater that burns oil (as kerosine) for heating or cooking |
| OI | an industry that produces and delivers oil and oil products |
| OI | a lamp that burns oil (as kerosine) for light |
| OI | ground oil cake |
| OI | oily drupaceous fruit of rabbitwood |
| OI | essential oil obtained from cloves and used to flavor medicines |
| OI | volatile liquid distilled from turpentine oleoresin |