Origin: < It, equiv. to capo head (see capo2) + tasto finger board, fret, lit., touch, feel, n. deriv. of tastare to touch lightly, perh. < VL *taxitare, for L taxāre, freq. of L tangere to touch
any of various devices for a guitar, lute, banjo, etc., that when clamped or screwed down across the strings at a given fret will raise each string a corresponding number of half tones.