资料来源 : pyDict

弄白,变白,白粉

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Whiten \Whit"en\, v. i. [imp. & p. p. {Whitened}; p. pr. & vb.
   n. {Whitening}.] [OE. whitenen; cf. Icel. hv[=i]tna.]
   To grow white; to turn or become white or whiter; as, the
   hair whitens with age; the sea whitens with foam; the trees
   in spring whiten with blossoms.

Whitening \Whit"en*ing\, n.
   1. The act or process of making or becoming white.

   2. That which is used to render white; whiting. [R.]

   {Whitening stone}, a sharpening and polishing stone used by
      cutlers; also, a finishing grindstone of fine texture.

资料来源 : WordNet®

whitening
     n : changing to a lighter color [syn: {lightening}]