tetraeder

== Danish == === Etymology === From the prefix tetra-, appended by Ancient Greek ἕδρα (hédra, “seat”). === Noun === tetraeder n (singular definite tetraederet, plural indefinite tetraedre) (geometry) tetrahedron ==== Inflection ==== === References === “tetraeder” in Den Danske Ordbog == Norwegian Bokmål == === Etymology === From tetra- +‎ -eder. === Noun === tetraeder n (definite singular tetraederet or tetraedret, indefinite plural tetraeder or tetraedre, definite plural tetraedra or tetraedrene) (geometry) a tetrahedron ==== Derived terms ==== tetraedrisk === References === “tetraeder” in The Bokmål Dictionary. “tetraeder” in Det Norske Akademis ordbok (NAOB). == Norwegian Nynorsk == === Etymology === From tetra- +‎ -eder. === Noun === tetraeder n (definite singular tetraederet, indefinite plural tetraeder, definite plural tetraedera) (geometry) a tetrahedron ==== Derived terms ==== tetraedrisk === References === “tetraeder” in The Nynorsk Dictionary. == Swedish == === Noun === tetraeder c (geometry) a tetrahedron ==== Declension ====