bĭ-formātus, a, um, adj. [bis],
doubleformed , two-shaped : non biformato impetu Centaurus (poet. for biformatus Centaurus impetu), Cic. poët. Tusc. 2, 8, 20 Kühner; v. biformis.
bi-fōrmātus adj., of two forms, double: impetus, C. (poet.). ...
An Elementary Latin Dictionary