Term: endorphin: a neurochemical occurring naturally in the brain and having analgesic properties
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: microphotometer: special kind of densitometer that measures density variations over a very small area
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: hoary willow: North American shrub with whitish canescent leaves
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: parthenote: a cell resulting from parthenogenesis
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: cicadidae: cicadas
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: photolithography: a planographic printing process using plates made from a photographic image
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: drinking age: the age at which is legal for a person to buy alcoholic beverages
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: cambarus: a genus of Astacidae
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: behalf: for someone's benefit (usually expressed as `in behalf' rather than `on behalf' and usually with a possessive)
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: acariasis: infestation with itch mites
Broader: neurochemical: any organic substance that occurs in neural activity | Unrelated: universe: everything that exists anywhere