from The Century Dictionary.
- noun In crystallography, a solid related to a tetrahedron, and contained under twelve equal triangles. It is the hemihedral form of the tetragonal trisoctahedron or trapezohedron.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Crystalloq.) A solid related to a tetrahedron, and contained under twelve equal triangles.
Sorry, no etymologies found.
Whether the more excited was zincoid or cuproid depended on the substance and its molecular condition.
_ -- Action current from more excited to less excited -- cuproid change in the excited -- e.g. fresh muscle and nerve, stale retina.
Stimulation of the uninjured end, approximating it to the condition of the injured, might then be said to induce a cuproid change.
The electric change produced in a normal nerve by stimulation may therefore be expressed by saying that there has been a negative variation, or that there was a current of action from the more excited to the less excited, or that stimulation has produced a cuproid change.
The uninjured end is therefore comparable to the zinc in a voltaic cell (is zincoid), the injured being copper-like or cuproid. [