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

Iron-gray \I"ron-gray`\, a.
   Of a gray color, somewhat resembling that of iron freshly
   broken. -- n. An iron-gray color; also, a horse of this
   color.

资料来源 : WordNet®

iron-gray
     adj : the gray color of iron [syn: {iron-grey}]
     n : the color of freshly broken cast iron [syn: {iron-grey}]