Duad is a 4 letter English word. It's valid Scrabble word worth 6 points. It's valid Words with friends word worth 7 points.
You can make 18 anagrams from letters in duad (addu).
A consists of two square-based pyramids turned so as to meet at their apices, and breaks up into two quartet rings and a duad.
The duad, with the Monad brooding behind it, is the fundamental principle of the Avesta.
The pillars are the same as in chlorine and its congeners, with a duad added at the base.
On the hyper level the triplet becomes a duad and a unit; the duad becomes two units; and the septet a triplet and a quartet.
Coming down nearer to our own time, we find a duad of great English poets, usually associated in our minds,—Byron and Scott.
But the belief of Zoroaster and that of Scandinavia regard the duad as still more deeply rooted in the essence of existing things.
It frankly accepts the duad as the true explanation of the actual universe.
The duad represented the line, as being bounded by two points or monads.