tenuto
 US /təˈnuːtoʊ/
 UK /təˈnuːtoʊ/

1. 
(especially as a direction) held on for its full time value or slightly longer
:
• 
The violinist played the note tenuto, giving it a rich, sustained sound.
• 
The conductor marked the passage tenuto to emphasize the sustained chords.
1. 
a symbol (a short horizontal line) indicating that a note or chord is to be held for its full time value or slightly longer
:
• 
The composer used a tenuto mark above the note to indicate its sustained duration.
• 
A tenuto can also imply a slight emphasis or articulation.