any of a class of salts derived from ammonium in which the nitrogen atom is attached to four organic groups, as in benzalkonium chloride; the salts are cationic surface-active compounds used as antiseptics and disinfectants.
a type of ionic compound that can be regarded as derived from ammonium compounds by replacing the hydrogen atoms with organic groups
[kwot-er-neyt, kwuh-tur-nit] /ˈkwɒt ərˌneɪt, kwəˈtɜr nɪt/ adjective 1. arranged in or consisting of four parts, as the leaves of certain plants.
[kwuh-tur-nee-uh n] /kwəˈtɜr ni ən/ noun 1. a group or set of four persons or things. 2. Bookbinding. four gathered sheets folded in two for binding together. 3. Mathematics. /kwəˈtɜːnɪən/ noun 1. (maths) a generalized complex number consisting of four components, x = x0 + x1i + x2j + x3k, where x, x0…x3 are real […]
[kwaht-lahm-buh] /kwɑtˈlɑm bə/ noun 1. . /kwɑːtˈlɑːmbɑː/ noun 1. the Sotho name for Drakensberg
[kwuh-tur-ni-tee] /kwəˈtɜr nɪ ti/ noun, plural quaternities. 1. a group or set of four. /kwəˈtɜːnɪtɪ/ noun (pl) -ties 1. a group of four, esp a concept of God as consisting of four persons