acciaccatura
noun
ac·ciac·ca·tu·ra (ˌ)ä-ˌchä-kə-ˈtu̇r-ə 
: a discordant note sounded with a principal note or chord and immediately released
Word History
Etymology
borrowed from Italian, literally, "bruising, crushing," from acciaccato, past participle of acciaccare "to bruise, crush, squash" (probably of onomatopoeic origin) + -ura -ure
First Known Use
1749, in the meaning defined above