tetartohedral


te·tar·to·he·dral

adjective \te-ˌtär-tə-ˈhē-drəl\

Definition of TETARTOHEDRAL

of a crystal
:  having one fourth the number of planes required by complete symmetry — compare hemihedral, holohedral

Origin of TETARTOHEDRAL

Greek tetartos fourth; akin to Greek tettares four — more at four
First Known Use: circa 1858

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