• (n.) Distinction by contrast.
Con`tra·dis·tinc'tion noun Distinction by contrast. « That there are such things as sins of infirmity in contradistinction to those of presumption is not to be questioned. South. » 
[n] - a distinction drawn on the basis of contrast
noun a distinction drawn on the basis of contrast; `sculpture in contradistinction to painting`
distinction by opposition or contrast: plants and animals in contradistinction to humans.