dac·ty·lol·o·gy /ˌdæktəˈlɑləʤi/
  手語法
  dac·ty·lol·o·gy /ˌdæktəˈlɑləʤɪ/ 名詞
  (手)指語
  Dac·tyl·ol·o·gy n.  The art of communicating ideas by certain movements and positions of the fingers; a form of sign language, especially the manual alphabets used by the deaf and dumb.
  Note: ☞ There are two different manual alphabets, the one-hand alphabet (which was perfected by Abbé de l'Epée, who died in 1789), and the two-hand alphabet. The latter was probably based on the manual alphabet published by George Dalgarus of Aberdeen, in 1680. See Illustration in Appendix.
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