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tri-hexahedral
tri-hexahedral adj.
Brit. 
/ˌtrʌɪhɛksəˈhiːdr(ə)l/
, /ˌtrʌɪhɛksəˈhiːdr(ə)l/U.S. /ˌtraɪhɛksəˈhidrəl/
/ˌtraɪhɛksəˈhidrəl/ΘΚΠ
the world > matter > chemistry > crystallography (general) > crystal (general) > specific crystal forms > [adjective] > miscellaneous others
secondary1816
trapezian1816
triacontahedral1816
tri-dodecahedral1816
tri-hexahedral1816
tri-octahedral1816
tri-rhomboidal1816
octodecimal1817
octoduodecimal1817
octosexdecimal1817
pentahexahedral1817
octahedrala1824
trigonal1878
pinacoidal1879
tetartopyramid1891
trisoctahedral1891
tetartohexagonal1895
tetartosystematic1895
1816 R. Jameson Treat. External Characters Minerals (ed. 2) 199 Tri-hexahedral,..when [the crystal's] surface consists of three.. ranges of planes, disposed six and six above each other... Tri-hexahedral nitrate of potash..; which is a six-sided prism, acuminated on both extremities with six planes.
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