Eumelanic is a word which describes the presence of dark pigmentation in an organism's body. This particular term is commonly used to refer to the dark brown or black coloration seen in some animals, such as birds, reptiles, and some species of mammals. There are several synonyms that can be used to describe eumelanic, including melanistic, melanotic, and melanic. These words refer to the same phenomenon of dark pigmentation and can be used interchangeably. In evolutionary terms, eumelanic pigmentation can provide an advantage to an organism in certain environments, such as providing camouflage to predators or absorbing more heat from the sun.