Zygosis, also known as conjugation, is a biological term that refers to the fusion of two cells to form a new individual. While it's an important process for reproduction in certain organisms, there are many different terms that are used to describe the same underlying concept. Some common synonyms for zygosis include copulation, fertilization, mating, and reproduction. In addition, there are many specialized terms that describe specific forms of zygosis, such as gynogenesis and androgenesis. Understanding the wide variety of terms that are used to describe zygosis is an important part of studying biology, and can help researchers to better understand the complex mechanisms that drive reproduction in different species.