from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A liquid mixture of two or more substances that retains the same composition in the vapor state as in the liquid state when distilled or partially evaporated under a certain pressure.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mixture of two or more substances whose liquid and gaseous forms have the same composition (at a certain pressure); the substances cannot be separated by normal distillation.
a-1 + Greek zein, to boil; see zeolite + Greek -tropos, turning; see -tropous.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek α- (a-, "no") + ζέειν (zeein, "to boil") + τρόπος (tropos, "state"). (Wiktionary)