Dactylologies is a 13 letter English word. It's valid Words with friends word worth 23 points.
You can make 1710 anagrams from letters in dactylologies (acdegilloosty).
First recorded in 1650-60; dactylo- + -logy
So long as this is true, dactylology can hardly claim to be more than one of the elements of a system of instruction for the deaf.
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