Impages, impagis, pen. pro. f. g. Fest. A tenon put in a morteise: apin driuen into timber to fasten the ioynt.
Lewis and Short: Latin dictionary
impāges (inp-), is, f. [in-pag, pango; analogous with compages], the border or frame-work which surrounds the panel of a door, Vitr. 4, 6; cf.: impages dicuntur quae a fabris in tabulis figuntur, quo firmius cohaereant, a pangendo, id est figere, Paul. ex Fest. p. 108 Müll.