We found 14 dictionaries that define the word horsepower hour:

General (11 matching dictionaries)

1. horsepower-hour: Merriam-Webster
2. horsepower-hour, horsepower-hour: Collins English Dictionary
3. horsepower-hour: Vocabulary.com
4. horsepower-hour: Webster's New World College Dictionary, 4th Ed.
5. horsepower-hour: Infoplease Dictionary
6. horsepower-hour, horsepower hour: Dictionary.com
7. Horsepower-hour: Wikipedia, the Free Encyclopedia
8. horsepower-hour: Rhymezone
9. horsepower-hour: FreeDictionary.org
10. horsepower-hour: Mnemonic Dictionary
11. horsepower-hour: TheFreeDictionary.com

Business (1 matching dictionary)

12. BusinessDictionary.com (No longer online)

Science (1 matching dictionary)

13. How Many? A Dictionary of Units of Measurement (No longer online)

Tech (1 matching dictionary)

14. Glossary of Energy Terms (No longer online)

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