Dyadic is a 6 letter English word. It's valid Scrabble word worth 13 points. It's valid Words with friends word worth 13 points.
You can make 54 anagrams from letters in dyadic (acddiy).
From the Greek word dyadikós, dating back to 1720-30. See dyad, -ic
The Pythagoreans having spoken of the point as a monad naturally were led to speak of the line as dyadic, or related to two.