paper having ruled lines put underneath a white sheet of paper in order to write straight; screen lit from behind (now: enseigne lumineuse); plastic film used to show images with an overhead, overhead transparency
transpiration (process of giving off water vapour through the skin or mucous membranes); sweat (fluid that exits the body through pores in the skin usually due to physical stress and/or high temperature for the purpose of regulating body temperature and removing certain compounds from the circulation)