Mid 18th century; earliest use found in Francis Peck (1692–1743), antiquary. From post-classical Latin sub verbo from classical Latin sub + verbō, ablative of verbum word.
Definition of sub verbo in US English:
sub verbo
adverbˌsʌb ˈvəːbəʊ
= sub voce. Abbreviated s.v.
Origin
Mid 18th century; earliest use found in Francis Peck (1692–1743), antiquary. From post-classical Latin sub verbo from classical Latin sub + verbō, ablative of verbum word.