a conical tube with a patterned hole at one end, fitted over the opening of a cloth funnel (pastry bag) , for shaping icings, food pastes, etc., as they are forced through by squeezing the bag.
PASTRY TUBE
Meaning of PASTRY TUBE in English
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012