| 释义 |
cuproid Cryst.|ˈkjuːprɔɪd|
[f. L. cupr-um copper + -oid. So called by Haidinger, because the form occurs in the mineral Tetrahedrite, a sulphide of copper and antimony.]
A solid contained under twelve equal triangles, formed by erecting a pyramid on each of the triangular faces of a tetrahedron.
1864Webster cites Dana. |