bimatris
Could not find bimatrem in Logeion dictionaries.
bimatrem Adjective: feminine accusative singular, Adjective: masculine accusative singular of bimatris
bĭmātris, e, adj. [bis - mater],
- having two mothers, poet. epithet of Bacchus (v. Bacchus init.): satumque iterum solumque bimatrem, Ov. M. 4, 12; Hyg. Fab. 167; Anthol. Lat. 1, 19, 2 (where it is scanned bīmăter).