achromatismn.

Brit.

/əˈkrəʊmətɪz(ə)m/,

/(ˌ)eɪˈkrəʊmətɪz(ə)m/, U.S.

/eɪˈkroʊməˌtɪz(ə)m/,

/æˈkroʊməˌtɪz(ə)m/

Origin: Formed within English, by derivation. Etymons: achromatic adj., -ism suffix.

Etymology: < achromat- (in achromatic adj.) + -ism suffix.

Science.

= achromaticity n.

ΘΚΠ

the world > matter > colour > state or mode of having colour > absence of colour > [noun]

uncolouredness1660

colourlessness1672

achromatism1797

achromaticity1821

blankness1850

huelessness1861

mirage1927

1797 Encycl. Brit. at Telescope Mr. Dollond was anxious to combine this achromatism of the eye-pieces with the advantages which he had found in the eye-pieces with five glasses.

1837 C. R. Goring & A. Pritchard Micrographia 77 Perfectly direct day-light also gives apparent achromatism with any common uncorrected lenses.

1887 Jrnl. Royal Microsc. Soc. 7 23 In the new objectives..the elimination of these errors realizes an achromatism of higher order than has hitherto been attained.

1939 R. Kingslake in K. Henney & B. Dudley Handbk. Photogr. iii. 37 The lack of achromatism of this lens was soon found to be a disadvantage.

1998 Philos. Trans. (Royal Soc.) A. 356 1994 An achromatic system..and a degrader shaped to preserve the achromatism.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).

单词	achromatism
释义	achromatismn. Brit. /əˈkrəʊmətɪz(ə)m/, /(ˌ)eɪˈkrəʊmətɪz(ə)m/, U.S. /eɪˈkroʊməˌtɪz(ə)m/, /æˈkroʊməˌtɪz(ə)m/ Origin: Formed within English, by derivation. Etymons: achromatic adj., -ism suffix. Etymology: < achromat- (in achromatic adj.) + -ism suffix. Science. = achromaticity n. ΘΚΠ the world > matter > colour > state or mode of having colour > absence of colour > [noun] uncolouredness1660 colourlessness1672 achromatism1797 achromaticity1821 blankness1850 huelessness1861 mirage1927 1797 Encycl. Brit. at Telescope Mr. Dollond was anxious to combine this achromatism of the eye-pieces with the advantages which he had found in the eye-pieces with five glasses. 1837 C. R. Goring & A. Pritchard Micrographia 77 Perfectly direct day-light also gives apparent achromatism with any common uncorrected lenses. 1887 Jrnl. Royal Microsc. Soc. 7 23 In the new objectives..the elimination of these errors realizes an achromatism of higher order than has hitherto been attained. 1939 R. Kingslake in K. Henney & B. Dudley Handbk. Photogr. iii. 37 The lack of achromatism of this lens was soon found to be a disadvantage. 1998 Philos. Trans. (Royal Soc.) A. 356 1994 An achromatic system..and a degrader shaped to preserve the achromatism. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021). < n.1797
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