Source:http://linkedlifedata.com/resource/umls/id/C0682685
GO: The narrow gap that separates the presynaptic and postsynaptic membranes, into which neurotransmitter is released. [GOC:jl, http://synapses.mcg.edu/anatomy/chemical/synapse.stm],NCI: The space between the presynaptic terminal and the postsynaptic membrane.