資料來源 : Webster's Revised Unabridged Dictionary (1913)

   {Phenol alcohol} (Chem.), any one of series of derivatives of
      phenol and carbinol which have the properties of both
      combined; thus, saligenin is a phenol alcohol.

   {Phenol aldehyde} (Chem.), any one of a series of compounds
      having both phenol and aldehyde properties.

   {Phenol phthalein}. See under {Phthalein}.

Phthalein \Phthal"e*in\, n. [See {Phthalic}.] (Chem.)
   One of a series of artificial organic dyes made as
   condensation products of the phenols with phthalic acid, and
   well represented by phenol phthale["i]n. Their alkaline
   solutions are fluorescent.

   {Phenol phthalein}, a white or yellowish white crystalline
      substance made from phthalic acid and phenol. Its solution
      in alkalies is brilliant red, but is decolorized by acids,
      and as this reaction is exceedingly delicate it is used as
      an indicator.