SG Heritage Dictionary

Portionist [Noun] Webster's Dictionary 1828

1. One who has a certain academical allowance or portion.

2. The incumbent of a benefice which has more rectors or vicars than one.

Portionist [Noun] Webster's Dictionary 1913

1. A scholar at Merton College, Oxford, who has a certain academical allowance or portion; -- corrupted into postmaster.

2. One of the incumbents of a benefice which has two or more rectors or vicars.