1960s; earliest use found in William Garner (b. 1920). From Russian rezidencija, probably after rezident. Compare earlier residency and slightly later residence.
Definition of rezidentsia in US English:
rezidentsia
(also rezidentia)
nounˌrɛzɪˈdɛnsɪə
= residentura.
Origin
1960s; earliest use found in William Garner (b. 1920). From Russian rezidencija, probably after rezident. Compare earlier residency and slightly later residence.