Formation of the word "peripheral"

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Oct 11, 2018 07:30
I heard about the word "peripheral" long ago in my professional literature reading. It refers to the blood extracted from arteries, veins, or end organs, but not from blood-generating organs such as the liver or bone marrows. I presumed that peri- means "near" or "next to" and so "pheral" must mean something like "borderline" or "skirt area." However, I couldn't locate a word with my assumed meaning that corresponds to the "pheral" part of the word "peripheral." Does that mean it is better not to parse the word "peripheral" into smaller word units?
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