research octane number

English

Noun

research octane number (plural research octane numbers)

1. An octane number, used by the American Society for Testing and Materials to estimate the antiknock characteristics of a fuel at low engine speeds.

   Synonym: (initialism) RON

Hypernyms

• octane number
• octane rating

Coordinate terms

• motor octane number (MON)
• anti-knock index (AKI)

Derived terms

• RON (abbreviation)