- any of various substances, as antidiuretic hormone, formed in the nervous system and delivered to an effector organ through blood circulation.
- a hormone, such as noradrenaline, oxytocin, or vasopressin, that is produced by specialized nervous tissue rather than by endocrine glands
- A hormone secreted by or acting on a part of the nervous system.
- A hormone that is produced and secreted by neurons and that effects its action on the nervous system. The hormones secreted by the hypothalamus that in turn control the secretions of the pituitary gland are neurohormones.