noun Download 🔗Share A hydroxy quaternary ammonium compound with formula (CH3)3N+CH2CH2OHX−. It is an essential nutrient for cardiovascular and brain health and for cell membrane formation. Examples : "To support her baby's brain development, the pregnant woman made sure to eat foods rich in choline, such as eggs and beef liver. " compound substance chemistry biochemistry medicine physiology food biology Chat with AIVocabulary GamePractice Reading