D defs.my
Entry 1 sense Webster, 1913

Peri-

/(pĕr"ĭ-)/ · Per·i- · IPA /ˌpɛɹ.ə-/
01 A prefix used to signify around, by, near, over, beyond, or to give an intensive sense; as, perimeter, the measure around; perigee, point n…
  1. 1.
    A prefix used to signify around, by, near, over, beyond, or to give an intensive sense; as, perimeter, the measure around; perigee, point near the earth; periergy, work beyond what is needed; perispherical, quite spherical.