synapse (n.), synaptic (adj.)

https://doi.org/10.1351/goldbook.12109
Functional junction between two neurons, where a nerve impulse is transmitted from one neuron to another, by neurotransmitters.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 909 [Terms] [Paper]