decolorant
noun
de·col·or·ant
variants:
or British decolourant \ (ˈ)dē-ˈkəl-ər-ənt, -ə-rənt 
\
\
Medical Definition of decolorant
(Entry 1 of 2)
: a substance that removes color
decolorant
adjective
variants:
or British decolourant
Medical Definition of decolorant (Entry 2 of 2)
: capable of removing color