The reabsorption of a neurotransmitter by the presynaptic neuron after it has been released into the synaptic cleft.
From 're-' (back, again) + 'uptake' (absorption). Technical term from neuropharmacology.
Reuptake is the brain's recycling system — after a neurotransmitter delivers its message, the sending neuron slurps it back up to use again.
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