ˈpräl.ˌtrilə(r) noun
( -s )
Etymology: German, from prallen to rebound (alteration — influenced by Middle High German pralte, past, & gepralt, past participle — of Middle High German prellen ) + triller trill, from Italian trillo; akin to Low German prall full, tight, Old Frisian pra e lling testicle — more at trill
: a melodic musical grace made by a quick alternation of a principal tone with an upper auxiliary tone — called also inverted mordent