What is "metalless"

Usage examples of "metalless".

It was an account of not just one family, but all the members of the conspiracy who were exiled to this metalless planet as a horrible example to the rest of the Republic of what happened to people who tried to establish a government of the intellectual elite.

And though they were handicapped—fireless save for volcanic outlets where glass was made as a precious material, metalless, unable to develop more than a rudimentary astronomy, the laws of motion and gravity and light propagation obscured for them by the surrounding water—they had thought their way through to ideas which not only made sense but which drove directly toward insights man had not had before Planck and Einstein.