Artificial intelligent assistant

dital

dital
  (ˈdaɪtəl)
  [f. It. dito finger, after pedal: cf. It. ditale glove-finger, finger-stall, thimble.]
  The name given to a kind of stop to be pressed by the thumb, by which the pitch of a guitar- or lute-string can be raised by a semitone. dital harp, an instrument invented by Edward Light in 1798, and patented with improvements in 1816, intended to be an improvement of the guitar. It was fitted with ditals.

1816 Specif. E. Light's Patent No. 4041. 2 To the harp lute at present in use I apply certain pieces of mechanism which I call ditals or thumb keys. 1880 Grove Dict. Mus. s.v. Dital harp, Called ‘ditals’ or ‘thumb-keys’, in distinction from ‘pedals’ or ‘foot-keys’.

Oxford English Dictionary

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