What term describes a structure phrase that includes antecedent and consequent units?

The term that describes a musical structure consisting of both antecedent and consequent units is referred to as periodic. In music, the antecedent is the first phrase or musical idea that often ends with a sense of rest or pause, while the consequent is the second phrase that typically responds to the antecedent, often providing a resolution or completion of the musical thought. This pairing creates a balance and symmetry that characterizes the periodic structure.

In the context of music theory, recognizing periodic forms is essential as they are foundational to many classical compositions, where composers utilize this structure to create tension and release within their works. The understanding of how these phrases interact and resolve is key to appreciating the overall musical form. Other terms listed do not accurately capture this specific relationship of antecedent and consequent phrases, as they are used for different concepts within music theory.