| 释义 |
pe·riph·ery
\pəˈrif(ə)rē, -ri\ noun
(-es)
Etymology: Middle French peripherie, from Late Latin peripheria, from Greek periphereia, from peripherēs moving around (from peripherein to carry around, turn around, from peri- + pherein to carry) + -eia -y — more at bear
1. : the perimeter of a circle, ellipse, or other closed curvilinear figure; also : the perimeter of a polygonal figure
2. : the external boundary or surface of any body
< the periphery of an orange >
< the periphery of a tire >
3.
a. : the outward bounds of something as distinguished from its internal regions or center : encompassing limits : confines
< the drift toward the periphery of the great metropolitan districts — Oscar Handlin >
< the periphery of the retina — F.A.Geldard >
< the fixed stars at the periphery of the universe were stationary — S.F.Mason >
< an exploration of the periphery of logic — M.R.Cohen >
b. : surrounding space : an area lying beyond the strict limits of a thing
< around each of these states was a periphery of mixed populations that made exact boundaries on racial lines hopeless — Herbert Hoover >
4. : the regions (as the sense organs, the muscles, and the viscera) in which nerves terminate |