Hexads is a 6 letter English word. It's valid Scrabble word worth 16 points. It's valid Words with friends word worth 15 points.
You can make 82 anagrams from letters in hexads (adehsx).
1650-60; Late Latin hexad- (stem of hexas) Greek hexad- (stem of hexás) unit of six, equivalent to héx six + -ad- -ad1
Six dyad axes of two kinds are perpendicular to the hexad axis.
This is the hexad axis or hexagonal axis, for which the angle of rotation is 60, or one-sixth of 360.
In crystals of this division of the hexagonal system the principal axis is a hexad axis of symmetry.
The hexad axis is uniterminal and all the forms are open forms.
Perpendicular to the hexad axis are six dyad axes of two kinds and each perpendicular to a vertical plane of symmetry.
Here there is a plane of symmetry perpendicular to the hexad axis; there is also a centre of symmetry.
Six planes of symmetry of two kinds intersect in the hexad axis.
There can be only one hexad axis of symmetry in any crystal (see figs. 77-80).
No other element is here associated with the hexad axis, which is uniterminal.
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