Synopsis This encyclopaedic dictioinary in three volumes has been compiled especially for under graduate and post graduate students of Botany, Agriculture, Horticulture, Ecology, genetics, organic evolution, microbiology and Environmental science. This dictionary is a veritable mine of information. All the entries are judiciously selected and elaborately dealt with. This dictionary also includes many terms which have been borrowed for more general usage. The entries in this dictionary have been described in a clear and explanatory style to provide both straight forward definitions and invaluable background information. This approach combined with an extensive cross referencing system enables the reader to place each entry into a broader scientific context. Many diagrams have been used to demonstrate the meaning of a term. A sincere effort has been made to describe every term in the light of modern development.