Fungus

A fungus (plural fungi or funguses) is an organism that is a member of the fungi kingdom, which includes many microorganisms such as yeast and mold, and mushrooms. Although large funguses such as mushrooms tend to look like plants, funguses behave more like animal cells than plants at a cellular level. The key feature that distinguishes a fungus from the other kingdoms is a cell wall made of chitin. Although technically not plants, funguses are studied in a field of botany called mycology.