mesostates

Noun

mesostate (plural mesostates)

1. An intermediate physical state of matter between solid and liquid, in which the molecules have more freedom of movement than when locked in a crystal lattice, but less freedom of movement than when in the liquid state.
   • […] the liquid to the solid state via first-order phase transformations, which must be preceded by a breakdown of the structure of the mesostate—an intermediate state of the alum in its transition from the solution to the crystaline phase.1974, Russian Journal of Physical Chemistry - Volume 48, page 896
2. A composite state of a physical system that is determined by the overall configuration of many microstates; e.g. the heat of a substance (mesostate), which is made up of the aggregate of motions of many molecules (microstate).
   • If the manipulation is slow enough, and the driving connects different mesostates, then jumps between states in the same mesostate satisfy the detailed balance condition.2021, Luca Peliti, Simone Pigolotti, Stochastic Thermodynamics: An Introduction, page 42
3. A description of an aspect of a geographical system at a level between complete detail (the microstate) and a simple summary statistic or percentage (the macrostate).
   • In operational urban simulation models, virtually no attempt is made to simulate at the level of microstates, i.e., individual behavior. Most of the models operate at the mesostate and/or macrostate level.1978, Stephen H. Putman, “The Integrated Forecasting of Transportation and Land Use”, in William Frederick Brown, editor, Seminar on Emerging Transportation Planning Methods
4. (rare) An intermediate metabolic product in the formation of anastates or catastates.
   • In this downward parth are probably many steps, two of which become conspicuous, the formation of some intermediate product to "mesostate," as we may call it, such as zymogen or mucigen, and the conversion of the zymogen into an actual ferment or of the mucigen into mucin — that is, of the...1885, Sir Michael Foster, A Text-book of physiology, page 336