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A change in color caused by variation of the physical conditions to which a body is subjected, especially such a change caused by variation in temperature.

met′a·chro·mat′ic (-măt′ĭk) adj.


1. (Biology) (of tissues and cells stained for microscopical examination) taking a colour different from that of the dye solution
2. (Biology) (of dyes) capable of staining tissues or cells a colour different from that of the dye solution
3. (Biology) of or relating to metachromatism
References in periodicals archive ?
On histologic examination, granules exhibited a typical, although faint, metachromasia with toluidine blue and Giemsa stains (Fig 2D).
It has often been stated that in experimental amyloidosis the metachromasia with gentian or methyl-violet is the only reaction which is distinct, the characteristic coloring with iodin or iodin sulphuric acid being absent, or much less pronounced (Bailey).