The Collaborative International Dictionary of English v.0.48:

Cellarer \Cel"lar*er\, n. [LL. cellararius, equiv. to L.
   cellarius steward: cf. F. cell['e]rier. See Cellar.]
   (Eccl.)
   A steward or butler of a monastery or chapter; one who has
   charge of procuring and keeping the provisions.
   [1913 Webster]