Triller (m)
(with) definite article: dertrill/shake performed on a bagpipe (&c.)
Duden Oxford Großwörterbuch Englisch [German-English & English-German]. Mannheim, &c., 2005 (3, revised)
Gelderen, I. van: Duits woordenboek, I: Duits-Nederlands. Groningen, 1975 (14/5)