triakisoctahedron

noun
tri·a·kis·octahedron | \ ¦trīəkə̇s , trīˈak-+ \

Definition of triakisoctahedron 

: a trigonal trisoctahedron

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History and Etymology for triakisoctahedron

International Scientific Vocabulary triakis- (from Greek triakis three times) + octahedron; akin to Greek treis three

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