dual
1. du.al \'d(y)u:-*l\ \d(y)u:-'al-*t-e-\ \'d(y)u:-*(l)-le-\ aj [L dualis, fr. duo two - more at TWO] of grammatical number 1: denoting reference to two 2a: consisting of two parts or elements or having two like parts : DO UBLE 2b: having a double character or nature - du.al.i.ty n 2. dual n : the dual number of a language or a form in it