释义 |
bluestone I. \ˈ ̷ ̷ˌ ̷ ̷\ noun Etymology: blue (I) + stone 1. : the hydrated copper sulfate CuSO4.5H2O 2. : a building or paving stone of bluish gray color; specifically : a sandstone quarried near the Hudson river II. transitive verb : to treat (as a net or a stream) with copper sulfate |