-drən, -ˌdrän noun
( plural trapezohedrons -nz ; or trapezohe·dra -_drə)
Etymology: New Latin, from trapezium + -o- + -hedron
: a crystalline form whose faces are trapeziums:
a. : a tetragonal trisoctahedron
b. : an 8-faced hemihedral form of the tetragonal system
c. : a 12-faced hemihedral form of the hexagonal system
d. : a 6-faced tetartohedral form of the hexagonal system — called also trigonal trapezohedron