English: sheet glass
Welsh: gwydr ffenestri
Subject: Ystadau a Cadw
English definition: Ordinary window glass, not of such uniform thickness as float or plate glass.
Welsh definition: Gwydr ffenestri arferol, heb fod mor unffurf o ran trwch â gwydr nofiol neu wydr plât.
Welsh context: Ffynhonnell: Taflen wybodaeth gyhoeddus Cyngor Gwynedd.