n. 1 Printing an appliance in a printing-press used to equalize pressure between the platen etc. and a printing-sheet. 2 Archit. = TYMPANUM.
[ F tympan or L tympanum: see TYMPANUM ]
n. 1 Printing an appliance in a printing-press used to equalize pressure between the platen etc. and a printing-sheet. 2 Archit. = TYMPANUM.
[ F tympan or L tympanum: see TYMPANUM ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012