peri-

1.
a prefix meaning “about” or “around” (perimeter, periscope), “enclosing” or “surrounding” (pericardium), and “near” (perigee, perihelion), appearing in loanwords from Greek (peripeteia); on this model, used in the formation of compound words (perimorph).
Origin
< Greek, prefixal use of perí (adv. and preposition)
British Dictionary definitions for peri-

peri-

prefix
1.
enclosing, encircling, or around: pericardium, pericarp, perigon
2.
near or adjacent: perihelion
Word Origin
from Greek peri around, near, about
Word Origin and History for peri-

word-forming element meaning "around, about, enclosing," from Greek peri (prep.) "around, about, beyond," cognate with Sanskrit pari "around, about, through," Latin per, from PIE *per- (1) "forward, through" (see per).

peri- in Medicine

peri- pref.

  1. Around; about; enclosing: perimysium.

  2. Near: perinatal.

peri- in Science
peri-  
A prefix that means: "around" (as in pericardium,) or "near" (as in perihelion).