Less veined is the antonym for the word "more veined". "Veined" refers to the presence of visible lines or ridges on a surface, typically in reference to natural materials such as stones, leaves, or even human skin. So, if something is "more veined", it means it has more visible lines or ridges than something else. On the other hand, if something is "less veined", it means it has fewer visible lines or ridges than something else. The degree of veining depends on the type and characteristics of the material. For example, a marble slab can have high veining or low veining, depending on the variety to which it belongs.