periphery

Từ điển American Heritage Dictionary 4th

pe·riph·er·y (pə-rĭfʹə-rē)n. pl. pe·riph·er·ies
1. A line that forms the boundary of an area; a perimeter. See Synonyms at circumference.
2. The surface of a solid.
3.
a. The outermost part or region within a precise boundary.
b. A zone constituting an imprecise boundary. [Middle English periferie, from Medieval Latin periferia, from Late Latin peripherīa, from Greek periphereia, from peripherēs, carrying around : peri-, peri- + pherein, to carry; See bher-¹ in Indo-European Roots.]

• Từ đồng nghĩa / Synonyms:
  fringe, outer boundary