https://people.math.ethz.ch/~acannas/Outreach/ctt_simetria_passo_a_...

... friction and thus mitigate the greatest drawback of the vidraço [ polished limestone] which is to become ... azulejos derives from the Arabic az-zulayj and means “ polished stone”, exempli- fy how this imitation of ... friction and thus mitigate the greatest drawback of the vidraço [ polished limestone] which is to become ... azulejos derives from the Arabic az-zulayj and means “ polished stone”, exempli- fy how this imitation of ...