Dictionary.net

the systematic account of natural phenomena

the systematic account of natural phenomena

A former branch of knowledge embracing the study, description, and classification of natural objects (as animals, plants, and minerals) and thus including the modern sciences of zoology, botany, and mineralogy insofar as they existed at that time. In the 17th, 18th, and 19th centuries it was much used for the generalized pursuit of certain areas of science. (Webster, 3d ed; from Dr. James H. Cassedy, NLM History of Medicine Division)

Originally the description of all that is in nature, now used of the sciences that deal with the earth and its productions-botany, zoology, and mineralogy, especially zoology.