Tongue bifurcation, a type of body modification, or natural occurrence in some animals
False dilemma or bifurcation, in which two alternative statements are held to be the only possible options when there are more options
Bifurcation in context of clothing: clothing which separately covers each leg (such as trousers) is called bifurcated clothing, while clothing which covers them jointly (such as skirt) is called unbifurcated clothing.