research octane number
Oil Industry
noun
An octane number as determined by the research method of the American Society for Testing and Materials, used chiefly for low engine speeds and loads; abbreviated RON.
- The method involves running a fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of isooctane and n-heptane..
Origin
1940s; earliest use found in U.S. Patents.
- Murray catfish
- Murray cod
- Murray crayfish
- Murray, Gilbert
- Murray grey
- Murray lily
- Murray magpie
- Murray perch
- Murray pine
- Murray red gum
- Murray River
- Murray River crayfish
- Murray River pine
- Murray, Sir James
- Murray Valley encephalitis
- Murray Valley fever
- Murray whaler
- murre
- murrelet
- murrey
- murrey color
- murrey-colored
- murrey colour
- murrey-coloured
- murrhine