The Collaborative International Dictionary
Achromatizing
Achromatize \A*chro"ma*tize\, v. t. [imp. & p. p. Achromatized; p. pr. & vb. n. Achromatizing.] [Gr. 'a priv. + ? color.] To deprive of color; to make achromatic. [Also spelled achromatise.]
Wiktionary
achromatizing
vb. (present participle of achromatize English)