What is Triplicity?
According to the Merriam-Webster dictionary Triplicity has two meanings or definitions:

1. Triplicity is one of the groups of three signs (each distant 120 degrees from the other two) into which the signs of the zodiac are divided.
2. Triplicity is the quality or state of being triple or threefold.
3. To these I propose adding a third meaning or definition: Triplicity is the phenomenon of Threeness in life.
   
   

Why a third one?  Well let’s step back a bit and begin by defining the term “threes”.  There are three primary colors red, blue and green, and three states of matter gas, liquid and solid.  Space has three dimensions and we divide time into the past, present and future.  In other words “threes” are groups of three things that are distinct from and yet related to each other.

What is really interesting is that there are numerous "threes" in every sphere of life.  Threes are an observable phenomenon.  I considered various names for this phenomenon and eventually settled on Triplicity, and so the third meaning or definition. 

Read more at http://triplicity.org