end member

end member (plural end members)

1. Alternative form of endmember.
   • 1970, Arnold Reisman, “Condensed-vapor Phase Binary Diagrams Continued—Incongruently Vaporizing Systems”, in Phase Equilibria: Basic Principles, Applications, Experimental Techniques (Physical Chemistry; 19), New York, N.Y.; London: Academic Press, →ISBN, section C (Immiscible Solid–Vapor Systems Exhibiting Congruently Vaporizing Compounds), page 370:

     Most significant is the observation that the vaporous for the more volatile end member occupies a decreasingly smaller portion of the diagram as the other end member becomes less volatile. Ultimately, when the less volatile end member is essentially involatile, the vaporous of the volatile end member may become microscopically small.