noun, plural dac·ty·lol·o·gies.

  1. the technique of communicating by signs made with the fingers, especially in the manual alphabets used by the deaf.

noun plural -gies

  1. the method of using manual sign language, as in communicating with deaf people


  1. The use of the fingers and hands to communicate and convey ideas, as in the manual alphabet used by hearing-impaired and speech-impaired people.
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