Quaternary (disambiguation)

Quaternary (or quartary) is an adjective meaning "fourth in order" or "composed of four items". More specifically, it may refer to:

• Quaternary, the fourth geologic time period
  • Quaternary glaciation, the current ice age
• Quaternary numeral system (base-4) in mathematics
  • Quaternary Communications Encoding, a method using 4 physical signal levels, such as 2B1Q encoding.
  • Quaternary counting system, as used in some human languages
• Quaternary stress, a proposed degree of stress in linguistics
• Quaternary relation, in logic
• Quaternary structure in molecular biology
• Quaternary (chemistry)
  • Quaternary compound, in which an atom, usually carbon, is attached to four other atoms
  • Quaternary phase
• Quaternary sector of the economy, which encompasses knowledge-based services
• Quaternary care, health care that includes highly specialized or experimental treatments
• Quaternary prevention
• Quaternary (EP), an album by Mötley Crüe

See also

• Ternary (disambiguation)
• Tertiary (disambiguation)
• Quinary
• Senary
• Septenary
• Octonary
• Nonary
• Denary

Disambiguation page providing links to topics that could be referred to by the same search term This disambiguation page lists articles associated with the title Quaternary. If an internal link led you here, you may wish to change the link to point directly to the intended article.