Word Study
Peri-
CIDE DICTIONARY
Peri-, [Gr. , 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. [1913 Webster]
OXFORD DICTIONARY
Peri-, prefix.
1 round, about.
2 Astron. the point nearest to (perigee; perihelion).
1 round, about.
2 Astron. the point nearest to (perigee; perihelion).
Etymology
Gk peri around, about
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