Dictionary entry

Peri-

Webster's Dictionary 1913

Per″i– (pĕr″ĭ–). [Gr. περί, prep.] 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.