† perinephriumn. [ < peri-prefix + ancient Greek νεϕρός kidney (see nephro-comb. form) + -ium (see -ysuffix4)] AnatomyObsoleterare the connective tissue surrounding the kidney; the renal capsule.Apparently only attested in dictionaries or glossaries.
ΚΠ
1890 Cent. Dict.Perinephrium, the connective tissue which forms a more or less complete capsule or sheath for the kidney.