portamento

Portamento is a musical term primarily denoting a vocal slide between two pitches and its emulation by instruments such as the violin, and in 16th century polyphonic writing refers to an ornamental figure. It is also applied to one type of glissando as well as to the "slide" or "bend" functions of synthesizers. (see main article glissando).
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n. bearing, deportment, carriage, poise

(n.)
In singing, or in the use of the bow, a gradual carrying or lifting of the voice or sound very smoothly from one note to another; a gliding from tone to tone.
  

portamento /,pɔ:tə'mentou/
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