trichotomy

Division into three parts or elements.

A system based on three parts or elements, especially the theological description of humans as consisting of body, soul, and spirit.

Division into three parts; specifically, in theot., division of human nature into body (soma), soul (psyche), and spirit (pneuma).

Division into three parts.

Division or separation into three groups or pieces.

the following property of an order relation (e.g., “less than”): for any two elements (of a given algebraic structure) there are exactly three possibilities: either the first element is less than the second one, the second element is less than the first one, or the two elements are equal.

being threefold; a classification into three parts or subclasses