mordent

[mawr-dnt] /ˈmɔr dnt/
noun, Music.
1.
a melodic embellishment consisting of a rapid alternation of a principal tone with the tone a half or a whole step below it, called single or short when the auxiliary tone occurs once and double or long when this occurs twice or more.
Also, mordant.
Origin
1800-10; < German < Italian mordente biting < Latin mordent-, stem of mordēns, present participle of mordēre to bite; see -ent
British Dictionary definitions for mordent

mordent

/ˈmɔːdənt/
noun
1.
(music) a melodic ornament consisting of the rapid alternation of a note with a note one degree lower than it Also called lower mordent
Word Origin
C19: from German, from Italian mordente, from mordere to bite