A vocal performance with no instrumental accompaniment.
Singing solely or mainly without instrumental accompaniment.
Related to a form of purely vocal music mostly associated with American college performance groups.
In a manner of a choir with no instrumental accompaniment; literally, "in the style of the (Sistine) Chapel (in Rome)", such as a musical Mass done a cappella.
A tremulous broken sound.
The sound of a succession of chirps as uttered by birds.
Unwanted flicker that occurs in interlaced displays when the image contains vertical detail that approaches the horizontal resolution of the video format.
A slight trembling of the nerves.
To make the sound of a half-suppressed laugh; to titter; to giggle.
To have a slight trembling of the nerves; to be excited or agitated.
To utter a succession of chirps.
(of a person) To talk in an excited or nervous manner.