Parcel Select. Parcel Select is an economical choice for large or heavy packages and is the only USPS service that can be used for packages over 108 in girth. Cost is determined based on the distance, weight and dimensions of the mailpiece.
Definition of dopamine. : a monoamine C8H11NO2 that is a decarboxylated form of dopa and that occurs especially as a neurotransmitter in the brain.
dopamine. a compound produced by the decarboxylation of dopa; it is the direct precursor in the synthesis of norepinephrine and is also a neurotransmitter in the central nervous system. neurotransmitter, especially within the brain, in pathways related to the co-ordination of movement and to behaviour and emotion; deficiency of dopamine in the brain is associated with Parkinson's disease.