The term 'Science of Plant' can be summarized as Botany, which is a 6-letter word. Botany is the scientific study of plants, including their structure, growth, reproduction, metabolism, development, diseases, and chemical properties. Botany covers a wide range of scientific disciplines including ecology, evolution, genetics, biochemistry, and physiology. Botanists study the structure, function, and classification of plants, as well as their evolutionary relationships. Botany also includes the study of fungi, algae, and lichens.