hypochromicadj.

/hʌɪpəʊˈkrəʊmɪk/

Etymology: < hypo- prefix 1d + Greek χρῶμα colour + -ic suffix.

1. Medicine. Characterized by or designating a colour index less than one, or red blood cells that contain less hæmoglobin than normal and show an increased central pallor; esp. in hypochromic anaemia.

ΘΚΠ

the world > health and disease > ill health > a disease > disorders of internal organs > disorders of blood > [adjective] > disorders of red cells

megaloblastic1900

haemolysed1916

sickled1923

hyperchromic1924

hypochromic1924

hyperchromatic1929

hypochromatic1929

macrocytic1930

spherocytic1937

1924 T. R. Waugh in Can. Med. Assoc. Jrnl. 47 114/1 Such anaemias consequently show considerable variation in their blood pictures. If the response is slight..the red cells are small, and stain poorly,..and the color index is low. This type is therefore hypochromic.

1935 L. E. H. Whitby & C. J. C. Britton Disorders of Blood vi. 126 Hypochromic anæmia, especially, is more often a symptom than a disease.

1958 G. C. de Gruchy Clin. Haematol. ii. 42 In the tail of the film the cells are often distorted and flattened, and hypochromic cells may actually appear normochromic.

1966 J. W. Linman Princ. Hematol. v. 157 Most hypochromic anemias are caused by iron lack.

2. Characterized by or exhibiting a decrease in the extent to which light (usually, ultra-violet radiation) is absorbed; chiefly in hypochromic effect.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > chromatism > [adjective] > ultraviolet > relating to ultraviolet radiation > absorption

hyperchromic1939

hypochromic1946

1946 Ann. Rep. Progr. Chem. XLII. 118 For substituents attached to the carbonyl group, the effects are quite different, both λ_max. and ε_max. being usually decreased (hypso- and hypochromic effects).

1959 Jrnl. Amer. Chem. Soc. 81 6003/1 In general the oxidation of a methylthio group to a methyl sulfone involves a hypsochromic shift of from 10 to 40 mμ... This hypsochromic shift usually is accompanied by a definite hypochromic effect.

1968 M. W. Strickberger Genetics v. 73 The double-stranded form [of DNA] is called hypochromic, and the loose, single-stranded form is called hyperchromic.

Derivatives

ˌhypochroˈmicity n. the property of absorbing less (ultra-violet) light.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > light > chromatism > [noun] > spectrum > ultraviolet light > absorption

hyperchromicity1958

hypochromicity1958

1958 Nature 29 Nov. 1502/1 In view of the zero hyperchromicity of polyguanylic acids at alkaline pH's, the variation of hypochromicity with pH was examined for a number of derivatives.

1960 D. Shugar in Chargaff & Davidson Nucleic Acids III. xxx. 59 When the extinction of a given oligonucleotide is lower than that of its constituent mononucleotides, it is ‘hypochromic’ or exhibits ‘hypochromicity’.

This entry has not yet been fully updated (first published 1976; most recently modified version published online September 2021).

单词	hypochromic
释义	hypochromicadj. /hʌɪpəʊˈkrəʊmɪk/ Etymology: < hypo- prefix 1d + Greek χρῶμα colour + -ic suffix. 1. Medicine. Characterized by or designating a colour index less than one, or red blood cells that contain less hæmoglobin than normal and show an increased central pallor; esp. in hypochromic anaemia. ΘΚΠ the world > health and disease > ill health > a disease > disorders of internal organs > disorders of blood > [adjective] > disorders of red cells megaloblastic1900 haemolysed1916 sickled1923 hyperchromic1924 hypochromic1924 hyperchromatic1929 hypochromatic1929 macrocytic1930 spherocytic1937 1924 T. R. Waugh in Can. Med. Assoc. Jrnl. 47 114/1 Such anaemias consequently show considerable variation in their blood pictures. If the response is slight..the red cells are small, and stain poorly,..and the color index is low. This type is therefore hypochromic. 1935 L. E. H. Whitby & C. J. C. Britton Disorders of Blood vi. 126 Hypochromic anæmia, especially, is more often a symptom than a disease. 1958 G. C. de Gruchy Clin. Haematol. ii. 42 In the tail of the film the cells are often distorted and flattened, and hypochromic cells may actually appear normochromic. 1966 J. W. Linman Princ. Hematol. v. 157 Most hypochromic anemias are caused by iron lack. 2. Characterized by or exhibiting a decrease in the extent to which light (usually, ultra-violet radiation) is absorbed; chiefly in hypochromic effect. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > chromatism > [adjective] > ultraviolet > relating to ultraviolet radiation > absorption hyperchromic1939 hypochromic1946 1946 Ann. Rep. Progr. Chem. XLII. 118 For substituents attached to the carbonyl group, the effects are quite different, both λ_max. and ε_max. being usually decreased (hypso- and hypochromic effects). 1959 Jrnl. Amer. Chem. Soc. 81 6003/1 In general the oxidation of a methylthio group to a methyl sulfone involves a hypsochromic shift of from 10 to 40 mμ... This hypsochromic shift usually is accompanied by a definite hypochromic effect. 1968 M. W. Strickberger Genetics v. 73 The double-stranded form [of DNA] is called hypochromic, and the loose, single-stranded form is called hyperchromic. Derivatives ˌhypochroˈmicity n. the property of absorbing less (ultra-violet) light. ΘΚΠ the world > matter > physics > electromagnetic radiation > light > chromatism > [noun] > spectrum > ultraviolet light > absorption hyperchromicity1958 hypochromicity1958 1958 Nature 29 Nov. 1502/1 In view of the zero hyperchromicity of polyguanylic acids at alkaline pH's, the variation of hypochromicity with pH was examined for a number of derivatives. 1960 D. Shugar in Chargaff & Davidson Nucleic Acids III. xxx. 59 When the extinction of a given oligonucleotide is lower than that of its constituent mononucleotides, it is ‘hypochromic’ or exhibits ‘hypochromicity’. This entry has not yet been fully updated (first published 1976; most recently modified version published online September 2021). < adj.1924
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