ach·ro·ma·tic·i·ty

[ak-roh-muh-tis-i-tee, ey-kroh-]
noun Optics.

Origin:
1835–45; achromatic + -ity

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To achromaticity
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World English Dictionary
achromatic (ˌækrəˈmætɪk) [Click for IPA pronunciation guide]
 
adj
1.  without colour
2.  capable of reflecting or refracting light without chromatic aberration
3.  cytology
 a.  not staining with standard dyes
 b.  of or relating to achromatin
4.  music
 a.  involving no sharps or flats
 b.  another word for diatonic
5.  denoting a person who is an achromat
 
achro'matically
 
adv
 
achromatism
 
n
 
achromaticity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
00:10
Achromaticity has a plethora of syllables.
So is pneumonoultramicroscopicsilicovolcanoconiosis. Does it mean:
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Example sentences
In presence of linear space charge this definition of achromaticity does not hold.
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