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periphery

/pəˈɹɪf.ə.ɹi/ noun

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about periphery at Wordnik → Where our words come from →

  1. The outside boundary or surface of something.

Origin

Borrowed from Middle French peripherie. Compare Middle English periferie (“one of three layers of atmosphere (lower, middle, and upper) believed to surround the Earth”), from the same origin, although the Modern English term most likely does not descend from it.

From Wiktionary, via Kaikki.org (CC BY-SA)