Usually means: Measurement of gasoline's knock resistance.
Definitions Related words Mentions
We found 4 dictionaries that define the word research octane number:

General (2 matching dictionaries)
  1. research octane number: Wiktionary
  2. Research Octane Number: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)
  1. research octane number: Encyclopedia

Tech (1 matching dictionary)
  1. AUTOMOTIVE TERMS (No longer online)

Definitions from Wiktionary (research octane number)

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

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