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achromatic (adj.)
[achromatic 词源字典]
1766, from Latinized form of Greek
akhromatos
"colorless," from
a-
, privative prefix (see
a-
(3)), +
khromat-
, comb. form of
khroma
"color" (see
chroma
) +
-ic
.
[achromatic etymology, achromatic origin, 英语词源]
[achromatic 词源字典]