binal

bi·nal

B0255300 (bī′nəl)adj. Twofold; double.
[New Latin bīnālis, twin, from Latin bīnī, two by two; see dwo- in Indo-European roots.]

binal

(ˈbaɪnəl) adjtwofold; double[C17: from New Latin bīnālis; see bin-]