The Collaborative International Dictionary of English v.0.48:
Two-sided \Two"-sid`ed\, a. 1. Having two sides only; hence, double-faced; hypocritical. [1913 Webster] 2. (Biol.) Symmetrical. [1913 Webster]WordNet (r) 3.0 (2006):
two-sided adj 1: capable of being reversed or used with either side out; "a reversible jacket" [syn: reversible, two-sided] [ant: nonreversible, one-sided] 2: having two sides or parts [syn: bilateral, two-sided]