pralltriller

prall·tril·ler

 (präl′trĭl′ər)
n. Music
A trill consisting of alternation between a written note and the note immediately above it. Also called inverted mordent.

[German : prallen, to rebound (alteration of Middle High German prellen) + Triller, trill (from Italian trillo, from trillare, to trill, probably of imitative origin).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pralltriller

(ˈprɑːlˌtrɪlə)
n
1. (Classical Music) an ornament used in 18th-century music consisting of an inverted mordent with an added initial upper note
2. (Classical Music) another word for inverted mordent
[German: bouncing trill]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive ?
Only three ornaments remain, the Pralltriller (Schneller), the mordent and the trill.
Bach and other theorists between, for example, the Pralltriller (starting on the upper note) and the Schneller (a quick main-note trill reserved for short notes).
No doubt the 'written-out crescendos' and other effects in a number of pieces can be amplified on the piano, just as a Schneller might occasionally be substituted for a Pralltriller. But to argue such points on the basis of inconclusive historical documents is misleading and ultimately futile.