The
Quaternary is a geologic period.
Quaternary (an adjective meaning "fourth in order" or "composed of four items") may also refer to:
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Quaternary (chemistry) (see also
Quaternary compound and
Quaternary phase)
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Quaternary structure
Protein quaternary structure is the fourth (and highest) classification level of protein structure. Protein quaternary structure refers to the structure of proteins which are themselves composed of two or more smaller protein chains (also refe ...
of proteins
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Quaternary sector of the economy
The quaternary sector of the economy is based upon the economic activity that is associated with either the intellectual or knowledge-based economy. This consists of information technology; media; research and development; information-based serv ...
, which encompasses knowledge-based services
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Quaternary care, health care that includes highly specialized or experimental treatments
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Quaternary numeral system (base-4) in mathematics
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Quaternary counting system, as used in some human languages
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''Quaternary'' (EP), an album by Mötley Crüe
See also
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Quinary
Quinary (base-5 or pental) is a numeral system with five as the base. A possible origination of a quinary system is that there are five digits on either hand.
In the quinary place system, five numerals, from 0 to 4, are used to represent a ...
, positional number system with base 5
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Ternary (disambiguation)
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Tertiary (disambiguation)
{{Disambiguation