As an adjective quaternary
is of fourth rank or order.
As a proper noun Quaternary
is the geological period of the Cenozoic Era immediately following the Tertiary. It is subdivided into the Pleistocene and the Holocene Epochs.
As a noun quaternity is
a group or set of four.
quaternary
English
Adjective
(-)
Of fourth rank or order.
Of a mathematical expression containing e.g. x4.
Related terms
* quaternion
See also
* singular, unary (1)
* primary (1st)
* binary (2)
* secondary (2nd)
* ternary or trinary (3)
* tertiary (3rd)
* quaternary (4)
* quartary (4th)
* quinary (5)
* senary (6)
* septenary (7)
* octonary (8)
* novenary (9)
* nonary (9th)
* denary (10)
* duodenary (12)
* vigenary (20)
* centenary (100)
quaternity
English
Noun
(countable) A group or set of four.
(uncountable) The state of being four; fourness.
