IPA: /trɪˌsoʊkˈteɪdrən/
KK: /trɪˌsoʊkˈtæhɪdrən/
A three-dimensional shape that has 24 equal flat surfaces, with each group of three surfaces corresponding to one surface of an octahedron.
The trisoctahedron is an interesting shape studied in geometry and crystallography.
Trisoctahedron is formed from "tri-" (meaning three), "octa-" (from Greek "oktahedron", meaning eight faces), and "-hedron" (from Greek "hedra", meaning face or base). The word describes a three-dimensional shape with eight faces, specifically a type of polyhedron.
Think of 'three' ('tri-') and 'eight faces' ('octa-') to remember that a trisoctahedron is a shape with three sets of eight faces.