Noun
1. Branch of biology that deals with the study of plants. (Dictionary.com)
2. A discipline of biology, the science of plant life. (Wikipedia.com)
3. The study of the origin, structure, development, growth, function, genetics, and reproduction of plants. (online-medical-dictionary.org)
Syn: plant science, plant biology
Word origin: from Ancient Greek βοτάνη botane, “pasture, grass, or fodder” and that from βόσκειν boskein, “to feed or to graze”