noun🔗ShareEndorfinasAny of a group of peptide hormones found in the brain that act as neurotransmitters and have properties similar to morphine."After a good run, she felt a rush of endorphins, making her feel happy and energized. "Después de una buena carrera, sintió una oleada de endorfinas, lo que la hizo sentir feliz y con energía.physiologymedicinebiochemistrybodysubstancesensationmindChat with AIVocabulary GamePractice Reading