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Definition of Neurotransmitter
1. Noun. A neurochemical that transmits nerve impulses across a synapse.
Generic synonyms: Neurochemical
Definition of Neurotransmitter
1. Noun. (biochemistry neuroscience) Any substance, such as acetylcholine or dopamine, responsible for sending nerve signals across a synapse between two neurons. ¹
¹ Source: wiktionary.com
Medical Definition of Neurotransmitter
1. Any of a group of substances that are released on excitation from the axon terminal of a presynaptic neuron of the central or peripheral nervous system and travel across the synaptic cleft to either excite or inhibit the target cell. Among the many substances that have the properties of a neurotransmitter are acetylcholine, noradrenaline, adrenaline, dopamine, glycine, y aminobutyrate, glutamic acid, substance P, enkephalins, endorphins and serotonin. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)
Lexicographical Neighbors of Neurotransmitter
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