neurotransmitter

noun

neu·​ro·​trans·​mit·​ter ˌnu̇r-ō-tran(t)s-ˈmi-tər 

-tranz-, 

ˌnyu̇r-

: a substance (such as norepinephrine or acetylcholine) that transmits nerve impulses across a synapse

Examples of neurotransmitter in a Sentence

Recent Examples on the Web

Addyi works on neurotransmitters in the brain, including dopamine and serotonin, rather than directly on hormones. —Emily Cegielski, Flow Space, 16 Dec. 2025

Addyi works on neurotransmitters in the brain. —Alice Park, Time, 16 Dec. 2025

The gut microbiome helps our bodies digest important nutrients, train our immune system, and can even stimulate the production of important neurotransmitters in our brains. —Laura Baisas, Popular Science, 3 Dec. 2025

These swings impact the brain’s neurotransmitters and stress systems in a way that makes emotional regulation harder. —Simone Sauter, Parents, 29 Nov. 2025

Word History

First Known Use

1961, in the meaning defined above

Rhymes for neurotransmitter

• babysitter
• bitter
• critter
• fitter
• fritter
• glitter
• hitter
• jitter
• knitter
• litter
• quitter
• ritter

Kids Definition

neurotransmitter

noun

neu·​ro·​trans·​mit·​ter ˌn(y)u̇r-ō-tran(t)s-ˈmit-ər 

-tranz-

: a substance (as acetylcholine) that carries a nerve impulse from one neuron to another across a synapse

Medical Definition

neurotransmitter

noun

neu·​ro·​trans·​mit·​ter ˌn(y)u̇r-ō-tran(t)s-ˈmit-ər, -tranz- 

: a substance (as norepinephrine or acetylcholine) that transmits nerve impulses across a synapse see false neurotransmitter