primus
One of the bishops of the Scottish Episcopal Church, who presides at the meetings of the bishops, and has certain privileges but no metropolitan authority.
my own grandfather, some time Bishop of Edinburgh, among its Primuses
1884, Gonzalo Canilla, speech at the Centenary of the consecration of Samuel Seabury
Where it comes from
From Latin prīmus (“[the] first”); related to prior, the comparative form. Partially cognate to foremost, from Proto-Indo-European [Term?]. Doublet of prime and primo.
Adapted from the Wiktionary entry primus (CC BY-SA 4.0).