资料来源 : pyDict

赤褐色砂石,赤褐色砂石建筑上流社会的,富有阶级的

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

Brownstone \Brown"stone`\, n.
   A dark variety of sandstone, much used for building purposes.

资料来源 : WordNet®

brownstone
     n 1: a reddish brown sandstone; used in buildings
     2: a row house built of brownstone; reddish brown in color