A Part
That which contributes to the whole but is not identical to it.
For example, the wheels of a car contribute to the whole car as what it is comprised of; whereas, a car is not a part of a car because it is identical to the whole which is comprised.
This also applies to all metaphysical parts—not just material parts. E.g., the apple was a part of my dream I had; the words are part of the sentence; the tree’s form is a part of its existence; the frequency is a part of a wave; etc.
Contrast with a relation.