We found 9 dictionaries that define the word action potentials:

General (4 matching dictionaries)

1. action potentials: Merriam-Webster
2. action potentials: Collins English Dictionary
3. action potentials: Wiktionary
4. Action potentials: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

5. Action potentials: Encyclopedia

Medicine (3 matching dictionaries)

6. action potentials: Merriam-Webster Medical Dictionary
7. Medical Dictionary (No longer online)
8. Action potentials: Medical dictionary

Science (1 matching dictionary)

9. Agricultural Thesaurus and Glossary (No longer online)

(Note: See action_potential as well.)

Definitions from Wiktionary (action potential) ▸ noun:  (physiology) A short-term change in the electrical potential that travels along a cell such as a nerve or muscle fiber. ▸ Also see action_potential ▸ Words similar to action potentials ▸ Usage examples for action potentials ▸ Idioms related to action potentials ▸ Wikipedia articles (New!) ▸ Words that often appear near action potentials ▸ Rhymes of action potentials ▸ Invented words related to action potentials