D defs.my
Entry 2 senses Webster, 1913

Periphery

/pə-rĭf′ə-rē/ · Pe·riph·er·y · IPA /pəˈɹɪf.ə.ɹi/
01 n. The outside or superficial portions of a body; the surface.
pl. Peripheries ((#))
  1. 1.
    The outside or superficial portions of a body; the surface.
  2. 2.
    The circumference of a circle, ellipse, or other figure.(Geom.)