achromaticityn.
/əˌkrəʊməˈtɪsᵻti/, /ˌeɪkrəʊməˈtɪsᵻti/, U.S. /eɪˌkroʊməˈtɪsᵻdi/, /æˌkroʊməˈtɪsᵻdi/ Science.
The quality of being achromatic (in any sense).
ΘΚΠ
the world > matter > colour > state or mode of having colour > absence of colour > [noun]
uncolouredness1660
colourlessness1672
achromatism1797
achromaticity1821
blankness1850
huelessness1861
mirage1927
1821 Philos. Trans. (Royal Soc.) 111 252 The first of our equations..has in general been the only one resorted to insure the achromaticity of the system.
1877 T. W. Webb in G. F. Chambers Handbk. Descr. Astron. (ed. 3) vii. viii. 745 Errors due to the imperfect achromaticity of the object-glass.
1939 Amer. Jrnl. Psychol. 52 410 The background can determine whether objects shall be tinged with illuminant hue, the contrasting hue, or shall lose in saturation to the point of achromaticity.
1967 Jrnl. Sci. Instruments 44 579/1 Reflecting objectives..are employed here because of their transparency in the ultra-violet region and their achromaticity.
2002 Proc. National Acad. Sci. U.S.A. 99 13354/2 In this experiment judgments of achromaticity and hue equality were made under the same conditions.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).
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n.1821