The term 'WATERY FLUIDS' can be summarized as liquids that are composed mostly of water. These fluids can be found in nature, such as in oceans, rivers, and lakes, and can also be artificially created, such as in laboratories. The crossword solution for this term is SERA, which is an acronym for Synthetic Environment for the Analysis of Life. This acronym is used to describe a type of laboratory environment where scientists can study the behavior of living organisms in a controlled setting.