1. A reference to a habitat which has a low or inadequate supply of moisture or dry conditions: Xeric is a generalized term for either flora (plants) or fauna 2. Relating to or adapted to an extremely dry living condition: Succulents or plants that are adapted to arid or dry conditions and characterized by fleshy water-storing tissues that act as water reservoirs; such as, cacti, aloes (plants with thick pointed leaves), and agaves (desert plants) are xeric plants.