tetraedrum

== English == === Noun === tetraedrum (plural tetraedra) Obsolete form of tetrahedron. 1662, Henry More, An Antidote Against Atheism, Book II, A Collection of Several Philosophical Writings of Dr. Henry More, p. 54: "... for example, a rightly-cut Tetraedrum, Cube or Icosaedrum have no more pulchritude in them, then any rude broken stone lying in the field or high-ways ..." == Latin == === Etymology === From Ancient Greek τετράεδρον (tetráedron, “four-sided”), from τέτταρες (téttares, “four”) + ἕδρα (hédra, “seat, base, face”). === Pronunciation === (Classical Latin) IPA(key): [tɛˈtra.ɛ.drũː] (modern Italianate Ecclesiastical) IPA(key): [teˈtraː.e.drum] === Noun === tetraëdrum n (genitive tetraëdrī); second declension (geometry) A tetrahedron; a solid figure with four faces. ==== Declension ==== Second-declension noun (neuter). ==== Descendants ==== → English: tetrahedron → French: tétraèdre