noun🔗ShareAcetilcolinaA neurotransmitter in humans and other animals. It is an ester of acetic acid and choline with chemical formula CH3COOCH2CH2N+(CH3)3."Example Sentence: "Acetylcholine is released by nerve cells to help muscles contract, allowing you to lift a book." "La acetilcolina es liberada por las células nerviosas para ayudar a que los músculos se contraigan, lo que le permite levantar un libro.biochemistryphysiologymedicinecompoundchemistrybiologysubstancefunctionbodyscienceorganismtechnicalanatomyChat with AIVocabulary GamePractice Reading