noun
[ U ] strong transparent paper that is placed on top of a drawing, etc. so that you can follow the lines with a pen or pencil in order to make a copy of it
noun
[ U ] strong transparent paper that is placed on top of a drawing, etc. so that you can follow the lines with a pen or pencil in order to make a copy of it
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005