Ce`no*zo"ic (?), a. [Gr. &?; recent + &?; life.] (Geol.) Belonging to the most recent division of geological time, including the tertiary, or Age of mammals, and the Quaternary, or Age of man. [Written also cænozoic, cainozoic, kainozoic.] See Geology.

&fist; This word is used by many authors as synonymous with Tertiary, the Quaternary Age not being included.

• (geology) of a geologic era within the Phanerozoic eon and comprises the Paleogene and Neogene periods from about 65 million years ago to the present, when the continents moved to their current position and modern plants and animals evolved
  
• (geology) the Cenozoic era