saddle-point azeotrope

saddle-point azeotrope

[′sad·əl ¦pȯint ′ā·zē·ə‚trōp]
(physical chemistry)
A rarely occurring azeotrope which is formed in ternary systems and for which the boiling point is intermediate between the highest and lowest boiling mixture in the system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.