# cetane number definition

• noun:
• The performance score of a diesel gas, corresponding to the portion of cetane in a cetane-methylnaphthalene mixture with the exact same ignition performance. A greater cetane number shows greater gasoline efficiency. Also referred to as cetane score.
• A performance score of diesel gas corresponding into the portion of cetane in a mixture with isocetane (or, formerly, methylnaphthalene) that will have the same performance.
• The overall performance rating of a diesel gasoline, corresponding toward percentage of cetane in a cetane-methylnaphthalene mixture with similar ignition overall performance. A higher cetane number suggests higher fuel effectiveness. Also referred to as cetane rating.
• A performance score of diesel gas equivalent towards the percentage of cetane in a mix with isocetane (or, previously, methylnaphthalene) that will have the same overall performance.

## Related Sources

• Definition for "cetane number"
• The performance score of a diesel gas, corresponding…
• Cross Reference for "cetane number"
• octane number