The Collaborative International Dictionary
Portionist
Portionist \Por"tion*ist\, n.
A scholar at Merton College, Oxford, who has a certain academical allowance or portion; -- corrupted into postmaster.
--Shipley.(Eccl.) One of the incumbents of a benefice which has two or more rectors or vicars.
Wiktionary
portionist
n. 1 A scholar at (w: Merton College), Oxford, England, who has a certain academical allowance or portion. 2 One of the incumbents of a benefice that has two or more rectors or vicars.