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 is a neurotransmitter that is found throughout the human body. It acts as a chemical messenger to affect movement, emotions and the ability to experience both pleasure and pain. Additionally, dopamine plays a large role in addiction. Continue Reading.