peri-
/ˈperɪ/prefix
1
- round; about表示“周围”, “环绕”：
pericardium
peristyle.
2
- Astronomy denoting the point nearest to a specified celestial body【天文】表示“最近点”：
perihelion
perilune.
比较APO-.
词源
from Greek peri 'about, around'.