Tetrad (area)

A tetrad, in the context of areas or regions, typically refers to a set of four units or components that are grouped together for a particular purpose. However, the term "tetrad" can have different meanings depending on the context in which it is used: 1. **Biology**: In biology, a tetrad is often associated with the process of meiosis, where it refers to a group of four chromatids that form during the first division of meiosis.