synaptic vesicle
A secretory organelle, typically 50 nm in diameter, of presynaptic nerve terminals; accumulates in high concentrations of neurotransmitters and secretes these into the synaptic cleft by fusion with the 'active zone' of the presynaptic plasma membrane.
GO:0070382
exocytic vesicle
is_a
GO:0098793
presynapse
part_of
docked vesicle
narrow