quaternary

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quaternary

 [kwah´ter-nar″e, kwah-ter´nar-e]
1. fourth in a series.
2. made up of four elements or groups.

qua·ter·nar·y (Q),

(kwah'tĕr-nār'ē, kwah-tĕr'nĕ-rē),
1. Denoting a chemical compound containing four elements; for example, NaHSO4. Compare: quaternary structure.
2. Fourth in a series.
3. Relating to organic compounds in which some central atom is attached to four functional groups; applied to the usually trivalent nitrogen in its "onium" state, R4N+, "quaternary nitrogen."
4. Referring to a level of structure of macromolecules in which more than one biopolymer is present. Compare: quaternary structure.
[L. quaternarius, fr. quaterni, four each, fr. quattuor, four, + -arius, adj. suffix]

quaternary

/qua·ter·nary/ (kwah´ter-nar″e)
1. fourth in order.
2. containing four elements or groups.

quaternary

[kwot′əner′ē, kwətur′nərē]
Etymology: L, quattuor, four
1 adj, pertaining to a chemical compound in which four atoms or groups of elements are bonded to one atom, such as a quaternary ammonium compound in which four organic radicals are substituted for the four hydrogen molecules on an ammonium ion.
2 n, fourth-level structure in proteins, as in the structure of hemoglobin made up of two alpha-globulins and two beta-globulins.

qua·ter·nar·y

(kwah'tĕr-nar-ē)
1. Denoting a chemical compound containing four elements.
2. Fourth in a series.
3. Relating to organic compounds in which some central atom is attached to four functional groups.
4. Referring to a level of structure of macromolecules in which more than one biopolymer is present.

qua·ter·nar·y

(Q) (kwah'tĕr-nar-ē)
1. Denoting a chemical compound containing four elements.
2. Fourth in a series.
3. Relating to organic compounds in which some central atom is attached to four functional groups.

quaternary (kwä´turnerē),

adj having four elements. Widely used in medicine, quaternary ammonium salts are molecules containing four alkyl or aryl groups attached to a nitrogen atom.

quaternary

1. fourth in a series.
2. made up of four elements or groups.

quaternary ammonium compounds
synthetic cationic detergents commonly used as disinfectants. They act against cell wall lipids in bacteria. An example is benzalkonium chloride. Effective in teat dips for mastitis control. Called also QUATs.
quaternary structure
the arrangement of separate polypeptide subunits in the structure of a multimeric protein.