A group or set of six.
- These axes are, respectively, diads, triads, tetrads, and hexads.
- Unfortunately there are not hexads or octads in nature.
- The duodecad can be considered as two hexads, upper and lower; as three tetrads, working in dynamic cooperation; or as four triads in a synthesis of immanence and transcendence.
Mid 17th century (denoting a series of six numbers): from Greek hexas, hexad-, from hex 'six'.
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