Recent Examples on the WebEuler implicitly assumed his polyhedra were convex, meaning a line segment joining any two points stayed completely within the polyhedron.quantamagazine.org, 26 Jan. 2021 This polyhedron is a classic prism made from professional-grade optical crystal glass.Popular Science, 23 Oct. 2019 The 20th-century mathematician Aleksandr Aleksandrov proved that for every two-dimensional polygon, there is one unique way of folding it to form a 3-D polyhedron.Quanta Magazine, 5 Jan. 2017 And the circle packing proof tells you that there’s a polyhedron that has all its edges tangent to a sphere.Quanta Magazine, 19 Mar. 2018 The printer cranks out up to 150 polyhedra each year – everything from models of protein crystallography to Mars' topography. Stacey Smith Lang, WIRED, 1 Nov. 2001
Word History
Etymology
borrowed from Greek polýedron, from poly-poly- + -edron-hedron
Note: The Greek word is attested in Euclid's Elementa, Book 12, Proposition 17.