noun, plural quat·er·nar·ies.
Origin of quaternary
Examples from the Web for quaternary
The Horse, however, does occur on the Continent associated with the remains of man during the Quaternary period.The Cambridge Natural History, Vol X., Mammalia|Frank Evers Beddard
Those that are interesting as poisons are monamines, diamines, and the quaternary ammonium bases.Poisons: Their Effects and Detection|Alexander Wynter Blyth
It differed, therefore, from the quaternary race of the caverns of Belgium.
This is confirmed by the great changes which have taken place in the distribution of land and water since the quaternary period.Human Origins|Samuel Laing
A laboratory of vertebrate paleontology for formations other than the Quaternary.