vibrato
Concise Oxford English Dictionary © 2008 Oxford University Press:
vibrato /vɪˈbrɑːtəʊ/
▶noun Music a rapid, slight variation in pitch in singing or playing some musical instruments, producing a stronger or richer tone.
– origin C19: Ital., past part. of vibrare ‘vibrate’.
'vibrato' also found in these Oxford entries:

