† metachromicadj.1
Chemistry. Obsolete. rare.
Of or relating to a hypothetical acid representing a less hydrated analogue of chromic acid.
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1861 Philos. Trans. (Royal Soc.) 151 21 A metachromic oxide may possibly be obtained by heating and dialysing the acetate, but I have not attempted to form it.
This is a new entry (OED Third Edition, December 2001; most recently modified version published online June 2018).
metachromicadj.2
/ˌmɛtəˈkrəʊmɪk/, U.S. /ˌmɛdəˈkroʊmɪk/ 1. = metachromatic adj. 2.
ΘΚΠ
the world > life > biology > substance > staining quality of substance > [adjective]
basophil1890
neutrophil1890
neutrophilic1893
oxyphil1893
oxyphilous1893
basophilic1894
basophilous1894
metachromatic1894
polychromatophilic1897
polychromatophil1898
chromophil1899
chromophilic1899
chromophobic1899
orthochromatic1899
polychromatic1899
pycnomorphous1899
fuchsinophil1900
neutrophilous1900
carminophilous1901
chromatoid1901
oxyphilic1901
pyknotic1902
sudanophil1902
chromaffin1903
metachromic1908
chromophobe1909
phaeochrome1909
sudanophilic1909
trachychromatic1909
polychromasic1911
chromaffinic1913
osmiophilic1923
osmophile1923
Feulgen-negative1928
fuchsinophilic1931
heteropycnotic1934
osmophilic1936
isopycnotic1950
Feulgen-positive1954
1908 Q. Jrnl. Microsc. Sci. 53 298 The granules (‘metachromic granules’, ‘red granules’, ‘volutine granules’, etc.) probably consist of some reserve material.
1979 Science 9 Feb. 554/1 Metachromic staining with basic dyes such as toluidine blue demonstrates the presence of glycosaminoglycans.
1989 Jrnl. Amer. Chem. Soc. 111 6805 Metachromic shifts were observed in the absorption spectra of 4 upon addition of DNA.
2. = metachromatic adj. 3.
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1968 P. Hershkovitz in Evolution 22 558/1 Metachromic processes appear to be correlated with a tendency toward loss of hair.
2000 New Scientist 5 Feb. 35/1 A partial explanation for metachromic colour progressions may come from studies of colour inheritance in animals as diverse as cows, fruit flies, chinchillas and koi.
This is a new entry (OED Third Edition, December 2001; most recently modified version published online March 2022).
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adj.11861
adj.21908