- the number six.
- a group or series of six.
Origin of hexad
Examples from the Web for hexad
Historical Examples of hexad
The hexad axis is uniterminal and all the forms are open forms.
This is the hexad axis or hexagonal axis, for which the angle of rotation is 60, or one-sixth of 360.
Perpendicular to the hexad axis are six dyad axes of two kinds and each perpendicular to a vertical plane of symmetry.
In crystals of this division of the hexagonal system the principal axis is a hexad axis of symmetry.
Here there is a plane of symmetry perpendicular to the hexad axis; there is also a centre of symmetry.
- a group or series of six
- the number or sum of six
Word Origin for hexad
- A group or series of six.
- An element or radical having a valence of six.