The Collaborative International Dictionary of English v.0.48:
Primus \Pri"mus\, n. [L., the first.] One of the bishops of the Episcopal Church of Scotland, who presides at the meetings of the bishops, and has certain privileges but no metropolitan authority. --Internat. Cyc. [1913 Webster]WordNet (r) 3.0 (2006):
primus n 1: the presiding bishop of the Episcopal Church of Scotland 2: a portable paraffin cooking stove; used by campers [syn: Primus stove, Primus]