vibration
     n 1: the act of vibrating [syn: {quiver}, {quivering}]
     2: a distinctive emotional atmosphere; sensed intuitively; "it
        gave me a nostalgic vibe"; "that man gives off bad vibes"
        [syn: {vibe}]
     3: a shaky motion; "the shaking of his fingers as he lit his
        pipe" [syn: {shaking}, {shakiness}, {trembling}, {quiver},
         {quivering}, {palpitation}]
     4: (physics) a regular periodic variation in value about a mean
        [syn: {oscillation}]
Source: WordNet® 2.0