Definition of "glissandos"

The arrangements on “Meet the Smithereens!” have all the vibrant energy and directness of the originals, and even minor details like the keyboard glissandos in “Little Child” and the overdubbed handclaps on “I Want to Hold Your Hand” and “I Saw Her Standing There” are faithfully preserved.

2007 January 13, Allan Kozinn, “Interpreting the Beatles Without Copying”, in New York Times‎