'Roasting jack' definitions:

Definition of 'Roasting jack'

From: GCIDE

Roasting \Roast"ing\, a. & n., from Roast, v. [1913 Webster]
Roasting ear, an ear of Indian corn at that stage of development when it is fit to be eaten roasted.
Roasting jack, a machine for turning a spit on which meat is roasted. [1913 Webster]