The term 'Science of Plant Life' can be summarized as Botany, which is a six-letter word. Botany is the scientific study of plants, including their structure, growth, reproduction, metabolism, development, diseases, and chemical properties. Botanists study how plants interact with their environment, including other organisms and the physical environment. Botany also includes the study of plant classification, genetics, and evolution. Botany is an important field of study, as it helps us to understand the natural world and how plants are used in our everyday lives.